WORKERS' STATE OF HEALTH UNDER LONG-TERM EXPOSURE TO ELECTROMAGNETIC RADIATION IN THE VHF BAND (30-300 MHZ)

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_ ~.'. ~.~.1~-~-?,-r-..-.?.. -- r~."~~'~'._~.. .. .?dS1.~....'.A?.-..r. ~~^cA'Ai- .._.+ ...J..r. .~r.f.. r1~c..:.. r~.L u 1} ..__._ :b ar ~' ~ .._ " ' . ~ ..-M_-.,.. _.c ...._? ~M _r`" t`tJti~ry"`_~tek: Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 GOVERNMENT WNLY STAT UDC 616-001.228.1-057-07 WORKERS' STATE OF HEALTH UNDER LONG-TERM EXPOSURE TO ELECTROMAGNETIC RADIATION IN THE VHF BAND (30-300,MHz) Prague PRACOVNI LEKARSTVI in Czech Vol 23 No 8, Oct 71 pp 265-271 [Article by Jana Pazderova, MD, (Clinic of Occupational Diseases, Prague) et all [Text) The purpose of our research was to contribute to the solution of the question as to whether human health is affected by long-term exposure to electromagnetic radiation in the VHF band, and thereby to enhance the setting of health norms that would eliminate not only any possible dam- age but also discomfort during work. The present work ties in with our previous study of the environment of radio transmitters [35), where we did not find any disease due to electromagnetic radiation, despite the fact that the intensity of the electromagnetic field exceeded in most cases the permissible level in Czechoslovakia. We will not dwell on the general problems of electromagnetic radiation and instead refer the read- er to certain summary reports and monographs [9, 24, 27, 28, 34, 441. In the literature, however, we did not find any study that solved the personnel's state of health at television transmitters, in terms of a more accurately defined exposure. Material and Methods In 1969 and 1970, during a 5-day confinement at the Clinic of occupation- al Diseases in Prague, we examined 58 employees of television transmit- ters from the entire territory of Czechoslovakia. The criterion for selection was the length and magnitude of exposure. We invited for ex- amination persons who had been exposed the most and the longest. Of the 88 invited employees, 30 declined for family reasons and work schedules. The mean age of the 49 examined males was 31.8 years (s = 7.6), and their mean exposure was 7.3 years (s = 3.0). The average age of nine ex- amined females was 33.9 years (s = 7.6), and their mean exposure was 6.9 years (s = 2.3). Of the mentioned 49 males, nine had worked previously at radio stations, an average of 7.9 years (s = 2.0). The majority of the examined subjects were employed as technicians and shift supervisors. During most of their working time they monitored the 1 GOV ' E ONLY Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88B01125R000300120013-7 GOVERNMENT USE ONLY operation of the transmitters. During the rest of their working time they recorded the readings of measuring instruments located on the in- dividual transmitters, readjusted them and performed routine maintenance. By nature their work was routine intellectual activity with average re- quirements in terms of intelligence, vigilance and attention. The edu- cational requirement was secondary education, but 17 technicians were continuing their education under work-study programs. At every work sta- tion the work was in shifts, with work cycles of varying length, and the workweek averaged 40 hours. The transmitters' frequency band was 48.5 to 230 MHz. In the subjects' histories we noted whether some disease occurred more frequently or afflicted several persons from the same work station. We devoted attention also to the subjects' social history, to their commit- ments outside working hours, particularly to enrollment in work-study programs, to opportunities for resting after a night shift, to the man- ner of commuting, etc. The results obtained in this manner were evalu- ated individually, in relation to the overall clinical picture. The employment history was supplemented by measurements of the electro- magnetic field intensity, and by computations of the exposure levels at the individual work stations. The electromagnetic field intensity was measured according to the standard method introduced in Czechoslovakia. Only the field's electrical component was determined by means of an in- tegrating field-strength meter for medical purposes, due too Rezny [46]. Essentially this is a transistorized HF voltmeter. The error of this method is given as ?30 percent. The measurements were made during the transmitters' peak power, with the transmitters' doors always open (Fig. 1), which is typical of the bulk of the operating time during the year. By comparing the accurate time studies of the individual occupa- tions with the employees' data, we computed the exposure per workday, i.e., the products of the field intensity, in volts per meter, and of the exposure time, in hours. The microclimatic conditions, the noise level and temperature, were measured by the routine methods employed in health inspection. All employees were examined under the same hospital regimen. Of the clinical and laboratory data, we first evaluated the pulse rate, taken at the end of the physical examination at the time of admission. The random blood pressure -- i.e., the mean of three measurements at rest -- was compared with the corresponding age group in Ripka's sample of the Czechoslovak population [37]. Values that exceeded by more than ?2 the standard deviation of the control group were regarded as abnormal. The same method was employed to evaluate the blood-sugar curves obtained by the Hagedorn-Jensen test [22]. Our control was the corresponding age group in Svoboda's sample of healthy individuals without familiar heredi- tary trends [42]. The protein spectrum of 54 subjects was investigated by the method of paper electrophoresis [22]. We determined the total protein, the percent of alpha 1, alpha 2, beta, and gamma globulins, and the albumin-globulin ratio. We compared the results with a control group of 55 healthy individuals whose mean age was higher by 6 years; we used the "t" test to determine the significance of the differences. 2 GOVERNMENT USE ONLY Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 ;b !l 6 r. Figure 1. Work station of a TV transmitter's operating personnel. Venous blood was taken for a complete blood count. The erythrocyte and leukocyte counts were based on the measured-volume principle. The plate- let count was made by the Piettes' methodi(361. erythrocyte count we also count was made from 100 cells. compared the hemoglobin content and the hematocrit, which methodological- ly is more accurate than counting erythrocytes. In the leukocyte com- ponent we determined the total leukocyte count, the number and percent of segmented neurophilic leukocytes and of lymphocytes, and the percent of eosinophils and of monocytes. We compared the results with our own control groups of healthy adults, and then determined the statistical significance of the obtained differences by means of the "t" test. The total plasma cholesterol was determined for all subjects by the routine laboratory method [22). In view of the fact that in 1969 most hospital- ized patients, and hence also the investigated sample, showed excessive- ly high cholesterol levels, we do not regard these values as realistic and have not evaluated them. Furthermore we performed liver tests (total and direct bilirubin, glu- cose tolerance, SGOT and SGPT), the ESR test, urinalysis and microscopic examination of the sediment. We took chest x-rays, and electrocardio- grams with standard and chest leads. The female subjects underwent gynecological examination. The pathological findings of the examina- tions and tests mentioned in this section will be analyzed separately below. Fifty-six subjects underwent neurological examination, according to the customary basic scheme. Close attention was devoted to neurovegetative symptoms (emotional erythema, Maranon's sign, dermographism, changes in acral temperature and sweating, tremor of the extended fingers, and changes in the pulse rate during examination, due to emotional causes or to a type of respirational arrhythmia). The methods of examination and interpretation are described in greater detail in our previous work on the environment of radio transmitters [351. The results of the GOVERNMENT USE ONLY Declassified in Part - Sanitized Copy Approved for Release 2012/05/10 CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 V0 >, 0 M ~F o V It 0., O N N O 00 0 00 It 000 Ci0 00100 0100 tor- 0 O r CIO 01 00 a M O 0010 .OO 0 -+0 00 0t-0S0 O P 1 0 C OI C t0 0 0-+00 10 y F CO ..0Icvi U t ~7 V) t- V) ^.I 0 00 C7 '0 C) ri ri 00 00 r x ti u0 00 ?9 0 0 CI O 7 M to Cl C9 'C1 ., I- _ r- C% O = -.~IC!n Iry f7 ~ Ci C7 ^ i -r CI :1 ?1 ?? 00 0 '0 CI 0000 CC 0 O C! -P 000 a' O to O - L-) 'n 00 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 GOVERNMENT USE ONLY examination were compared with a 57-member control group of'the same age. Docent Styblova, who interpreted the electroencephalograms, did not find any statistically significant difference in the distribution of the normal, abnormal and pathological rhythms, as compared with the control group [41]. On the basis of random selection, 46 subjects. underwent psychiatric ex- amination. The results were compared with the findings for a 21-member control group of the same age and educational background, and were sub- jected to the chi-square test. The selected level of the least signi- ficant difference was p = 0.05. All the examined subjects completed psychological questionnaires aimed at detecting neurasthenic symptoms: Knobloch's N 5 questionnaire, the Eysenck EPIquestionnaires'A and B [17], and the MHQ questionnaire [11]. The results of the examination were compared with the findings for the Czechoslovak population, as reported on the basis of such questionnaires by Engelsmann et al [15, 16]. One ophthalmologist examined 51 subjects, and the rest were examined at another work station. This does not affect the evaluation of the re- sults in any way, because also here the findings were routine, commonly occurring among the Czechoslovak population. The anterior segment of the eye was examined in focal light, the refractive power was measured subjectively and objectively, and the lens was examined by biomicroscopy under artificially induced mydriasis. Intraocular tension was measured in subjects over 40, and the field of vision was checked when indicated. By means of the "t" test, the results were compared with a control group of 106 healthy individuals whose mean age was 33.1 years. Examination and Test Results The measured intensities of the electromagnetic field are presented in Table 1. It is evident that the standard limit of 10 V/m was not ex- ceeded at any work station. To the contrary, the mean values for the individual work stations are fairly low. However, the mean level of ex- posure at one of the work stations exceeded the permissible limit of 80. What the field intensities were in the past cannot be determined accur- ately, because systematic measurements were not conductedl. to some ex- tent it may be assumed that initially, during the installation of the equipment, the field intensity might have been temporarily higher, but upon the commencement of transmission the intensity was probably lower than now when the transmitter operate more hours per day. Noise at the work station consisted predominantly of low-frequency noise generated primarily by the air-conditioning equipment. The numbers of th.e noise-level grades ranged from 65 to 81 N. The optimal temperature at every work station was exceeded by 2?C on average. In the following we will dwell on the results of the clinical examina- tions and laboratory tests. In the subjects' histories we did not find any accumulations of nosological units; the individual diseases occurred Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 GOVERNMENT USE ONLY (1) Kontrola - r-( Celkov6 bilkoviny 54 6,09 0,12 (9) Televiznl pracovn(ci (3) Albu- miny 64 86,41 1,33 Af I 54 6,13 0,32 Aif~2 Beta -I Cia ) (7) globuliny A8g 54 54 54 54 8,65 10,74 18,93 1,28 0,47 0,49 0,70 0,07 r a 53 63 63 63 63 53 53 1 7,67 64,72 6,60 8,43 10,57 19,72 1,26 te? 0,27 1,37 0,36 0,40 0,47 0,84 0,07 (10) Televiznl a rozhlasov( pracovnici n 9 I 0 9 9 9 9 9- g 7,69 63,89 7,02 9,43 11,01 18,04 1,18 ts 0,33 2,64 0,04 1,39 1,42 1,10 0,14 (11) T-testy (12) Kontrola: televir.n( (13) Kontrola: tolevizn( a rozhlasov( 2,880? 0,73 1,84 0,75 0,50 1,45 0,60 2,90$* 1,16 2,03? 1,20 0,41 0,46 1,54 *Level of least significant difference 5 percent. **1 percent. 1. Control 2. Total protein 3. Albumin 4. Alpha 1 5. Alpha 2 6. Gamma 7. Globulin 8. Albumin-globulin ratio 9. Television personnel 10. Television and radio per- sonnel 11. "t" tests 12. Control vs. TV personnel 13. Control vs. TV and radio per- sonnel in an isolated manner and at the same age that we encounter the diseases in other patients. This in itself excluded the possibility of any cor- relation between these diseases and exposure, and therefore we did not evaluate them statistically. In four male subjects we found hyperten- sion that was diagnosed already during the study. Hypertension in two of these subjects was of the juvenile type. One patient aged 60 showed also pronounced signs of coronary insufficiency and hypertension that is not readily curable. The fourth hypertonic had also an anginal syndrome. In, all these cases, hypertension had been diagnosed already before 6 GOVERNMENT USE ONLY Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 GOVERNMENT USE ONLY employment at television transmitters. The blood pressure of the other subjects did not differ significantly from the blood pressure of the con- trol group. Neither physical examination nor electrocardiography re- vealed any pathological irregularities of the pulse rate. The blood-sugar level was pathological only in the case of the already mentioned 60-year-old patient who showed signs of general arterioscle- rosis. In the other patients there were no significant differences as compared with the control group. We present the protein spectrum in Fig. 2 because there are certain irregularities already in the second sample from an environment exposed to electromagnetic radiation. The mean hemoglobin content was higher for the male subjects than for the control group: 16.46 g% (ts = 0.29) as compared with 16.15 g% (ts = 0.18). The difference is merely at the 5-percent level of the least significant difference. The hematocrit values did not differ from the control group. The erythrocyte count of the female subjects did not differ significantly from the control group. The mean leukocyte count of the investigated subjects was higher than for the control group: 6655 (ts = 457.8) as compared with 6028 (ts = 371.7, based on a least significant difference level of 5 percent. Equally significant was the rise in the absolute lymphocyte count of the investigated sample, while the percent breakdown did not show any significant difference. Leuko- cytosis in five subjects was a concomitant symptom of inflammation of the upper respiratory tract or of the urinary tract. Without these five subjects, the mean leukocyte count was 6280, without any signifi- cant difference in comparison with the control group. Two males with hypertension and coronary insufficiency had correspond- ing pathological electrocardiograms. The electrocardiograms of the other subjects were normal. We diagnosed a single case of focal pul- monary tuberculosis, in the induration to calcification phase. Accord- ing to this patient's history, infection occurred in childhood. The liver tests were pathological for one female subject with chronic liver damage and pronounced hypercholesterolemia, for which she had been treated for some time. The gynecological findings of four female sub- jects were pathological: two had cystic degenerations of the ovaries, diagnosed prior to their present employment; one girl had chronic ad- nexitis; and one woman in her menopause had a myoma of the uterus. However, these women did not report any impairment of fertility, if and when pregnancy was desired. Entirely rare were complaints of a loss of potency in males, always within the framework of a neurasthenic syndrome, specifically among the male subjects who were enrolled in work-study programs and were over- burdened. There was no opportunity for a systematic sexuological ex- amination, and therefore we did not evaluate these data. In Table 3 we present in detail the results of our neurological examina- tion, because they are often the subject of discussion. Of the 46 per- sons who underwent psychiatric examination, 19 or 41.3 percent had no Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 GCI'IERNMENT USE ONLY Table 3. Pesults of N?urological Txamination, and Comparison with the Ccntrcl (_;roup lersons Percent 1. Clinical neurologi;,a 1 findings entirely normal 29 51.70 Abnormalities that unquestionably are unre- lated to electromagni.tic radiation Carpal tunnel syndrome 1 Radicular syndromes 4 After basocraniai fracture, with minor neurological symptoms 1 After paresis of th.~ facial nerve 1 Intercurrent hyj.ertensi_on 3 .?i.-tory of psychic disorder 1 Vasomotoric cephalalgia already before exposure Subtotal Abnormalities of a vegetative type With history preceding Exposure, or with recognized exogenous causes Without apparent exogenous or endogenous causes Subtotal Control group (57 individuals) Abnormalities of a vegetative type 2 13 23.00 3 11 14 25.00 16 28.07 psychic disorder. Psychis disorders were found in the rfmaining 27 sub- jects of 58.7 percent. On the basis of their symptoms these subjects have been div'~dd into four groups. 1. Subjects with light neurotic disturbances (insomnia, loss of appe- tite, fatigue, restlessness, nervousness, depression, and vegetative disturbances). These symptoms were light and did not affect the subjects' ability to work, nor their ordinary way of life. In this group we in- cluded 18 persons inq that in our sample we did not find any eye damage caused by electromagnetic radiation. We have examined two-thirds of all persons in Czechoslovakia who have worked the :Long.:-:t at television transmitters and have been exposed the most. This is a sufficient number. to make our conclusions reliable. We found that hygienic conditions at the work stations were favorable, that on average the ?electro.magne ti.c field's intensity never exceeded the per- in .issi to '1.0 \'/m, and that only at one transmitter was the exposure higher on average than the 80 spe_?ified in the standard. In none of the subjects did we find damage caused '%y elect:rcmagnet.ic radiation. Thus, we may say with full responsibility that disease due to electro- magnetic radiation cannot occur at the television transmitters if the hygienic limits a_? observed. It with the lengthening of the t.e?evisicn proyracn the hygienic condi- _ions at the work :;taU4ions deteriorate -- i.e., if the electromagnetic field's intensity and t:. e. exposure rise -- after a certain time it will Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 be necessary to conduct a complete checkup of the employees' state of health. The task will. be the easier because the medical examinations of newly hired personnel for transmitter stations include also electro- encephalograms, and thus it will be possible to compare the findings with the state of health at the time of hiring. Fifty-eight employees of television transmitter stations, 49 males and 9 females, were examined. Their mean age was 32.1. years, and their mean length of employment at television transmitters was 7.2 years. The transmission band ranged from 48.5 to 230 MHz. The electromagnetic field's mean intensity was 2.9 V/m (s = 0.4, range from 0 to 9.2 V/m). The mean exposure per workday, computed as the product of the field in- tensity (V/m) and of the period of exposure (hours), was 30.7 (s = 3.8, range from 6.5 to 97.1). The error in the methods of measurement is given as ?30 percent. The subjects' state of health was evaluated on the basis of a complete medical checkup that included the patients' history and the following tests: ECG, x-rays of heart and lungs, erythrocyte sedimentation rate, urinalysis, liver tests, and gynecological examination of the female subjects. The following examination and test results were compared with control groups and were tested for statistical significance: blood pressure; complete blood count including thrombocytes, protein spectrum and blood-sugar level; and ophthalmological, neurological, psychiatric and psychological examinations. Interpretations of the electroencephalo- grams will be published separately. In the examined subjects we found no sign of damage due to electromagne- tic radiation. Among the laboratory test results, the mean plasma pro- tein levels were significantly increased. Even though we do not regard this as pathological, the possibility of its correlation with exposure to electromagnetic radiation cannot be ruled out. The other test re- sults did not differ from those of the control groups. 1. Ariyevich, M. M., "Changes in Peripheral Blood Under the Chronic Action of Superhigh?-Frequency Electromagnetic Waves Upon the Organ- ism," "Konferentsi.ya Molodykh Nauchnykh Fabotnikov" (Conference of Young Scientists), Moscow, Academy of Medical Sciences USSR, In- stitute of Labor Hygiene and Occupational Diseases, 1958, pp 15-16. 2. Bach, S. A., Luzrick, A. J., and Bronr.el, A. S., "Effects of RF Energy on Human Gamma Globulin," JOURNAL OF MEDICAL ELECTRONICS, Vol 9, 1961, pp 9-14. 3. Barron, C. L., Love, A. A., and Baraff, A. A., "Physical Evalu- ation of Personnel Exposed to Microwave Emanation," JOURNAL OF 12 GOVERNMENT USE ONLY Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 MEDICAL ELECTRONICS, ME-4, 1956, p 144. 4. Pozik, L., Grule21'ova, J., Kol e5ar, D., and Sza}', V., "State of Heald of Personnel Exposed to Electromagnetic Waves," BRATISLAVSKE iLK.ARSKE LISTY, Vol 45, No 2, X965, pp 225-232. S. Bozik, L. , and C;ruberova, ,:J. , "Effect of Electromagnetic Waves on the Nervous System," PRACCVNI I,EI.AFESWI'V:J, Vol 19, 1967, pp 249-251. 6. Boyle, , cook, d. F., and Bu.chamara, T. 3., "Effects of Micro- waves. PreliminLry Invest4aetion," BRITISH JOURNAL OF PHYSICAL MEDICINE. Vci3, 1950, pp 2-9. 7. Carpenter, R. L., "Studies of the Effects of 2450--N+g Radiation on the Eye of the Rabbit," RAD,^-TR--59-140, 1959, pp 279-289. 8. Cleary, F. S., Pasterrack, B. S., "Cataract Incidence in Radar Work- t=," ARCHIVES OF ENVIRONMENTAL HEALTH, Vol 10, 1965, pp 179-182. 9. C).eary, S. F., "Considerations in the Evaluation of the Biological Effects of Exposure to Microwave Radiat..ion," JOURNAL OF THE AMERICAN INDUSTRIAL HYGIENE ASSOCIATION, Vol 31, 1970, pp 52-59. 10. Cosic, V., hxamer, M., and Gala, A., "Effects of Radar Installations on the Human Body," VOJNOSANIT. PREGL., Vol 20, 1'63, pp 119-126. 11. Crowns, S., and Crisp, A. H., "A Short Clinical Diagnostic Self- Ratinc Scale for Psychoneurotic Patients. The Middlesex Hospital 1 Questionnaire," BRITISH JOURNAL OF PSYCIIIATPY AND SOCIAL WORK, Vol 112, 1966, pp 917-923. 12. Daily, E., "1. Cl:.nical Study of the Results of Exposure of Labor- atory Personnel to Radar and HF Radio," US NAVY MEDICAL BULLETIN, Vol 41, 19,13, p 105-156. 1. Drogichina; E. A., Sadchikova, M. N., Ginzburg, G. A., and Tsulina, N. A., "Some Clinical Symptoms of the Chronic Effects of microwaves," GIGIYNNA TRtDA I PROFESSIONAL'NYYE ZABOLEVANIYA, Vol 6, No 1, 1962, i p 28-33. ] Droqichina, N. A., and Sadchikova, M. N., "Cl.ir,icL.1 :,yndrorres Due to the Action of Various RF Bands," ;;:r_;Ia'ENP TRUDA T PFO.FF_SSIONAL'- NYYF ZAlOLIV~NIYA, Vol. 6, No 1, 1965, pp 17-21. 15. Engelsmann, F., "Questionnaire Methods of Personality Inventory, ,ith Special Att-ntion to Neuroses," ZPRAVY VYZKUMNEHO USTAVU F~;YCHOLOGIE, No 6, 1966, I:p, 56-78. 16. a,9elsmar..n, .. , and Drdkcva, S , "Neurot.Lc Questionnaires N-5 and Sat.isfact.ion," C.ESk. SLOVFNSI:A PSVC,ICLOGIE, Vol `s, Nc 4, 1964, Up 340-348. Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 17. Eysenck, H. J., and Eysenk, E. G. F., "Manual of the Eysenk Person- ality Inventory," London. University of London Press, 1964, p 24. 18. Fofanov, P. N., "Hemodynamic Characteristics of Persons Working Under Long-Term Exposure to Superhigh-Frequency Electromagnetic Radiation," Moscow, KLINICHESKAYA MEDITSINA, Vol 44, No 4, 1968. 19. Gordon, Z. V., "Industrial Hygiene of Work With IS' Oscillators,'' a 1961 lecture at the Central Institute for the Further Training of Physicians, Moscow, Ministry of Health USSR. 20. Guskova, A. K., Dvizhkov, P. P., amd Drogichina, F. A., "Occupa- tional Diseases Caused by the Action of. Radiant. Energy," in the collection "Professional'nyye Bolezni" (occupational Diseases), edited by A. A. Letavet, Moscow, Medical Publishing House, 1964. 21. Haduch, S., Szerski, P., and Baranski, S., "Biological Effects of VHF and UHF Waves," LEKARSTWO WOJSKOWE, Vol 23, 1960, pp 792-802. 22. Horejsi, J., et al, "Zaklady Chemickeho Vysetrovani v Lekar.stvi" (Principles of Chemical Tests in Medicine), Prague, State Publish- ing House for Public Health Literature, 1964. 23. Huzl, F., Klimkova-Deutschova, E., et al, "Examination of Workers Exposed to VHF and Other Electromagnetic Waves in West Bohemia Kraj," PRACOVNI LEKARSTVI, Vol 18, 1963, pp 100-108. 24. Kalant, H., "Physiological Hazards of Microwave Radiation. A Sur- vey of Published Literature," CANADIAN MEDICAL ASSOCIATION JOURNAL, Vol 81, 1959, pp 575-582. 25. Klimkova-Deutschova, E., "Effect of Iff Electromagnetic Waves on the Nervous System," PLZENSKY LEKARSKY SBORNIK, Vol 21, 1963, pp 57-70. 26. Klimkova-Deutschova, E., et al, a report at the Coordination Con- ference of Researchers Investigating the Effects of Electromagnetic Waves, Prague, Institute of Labor Hygiene and Occupational Diseases, 1968. 27. Marha, K., "Biological Effects of HF Electromagnetic Waves," PRACOVNI LEKARSTVI, Vol 15, 1963, pp 201-206. 28. Marha, K., Musil, J., and Tuha, J., "E1.ektromagneticke Pole a Zivotni Prostredi" (The Electromagnetic Field and the Living En- vironment), Prague, State Publishing House for Public Health Lit- erature, 1968. 29. Minecki, L., "Assessment of the Health Norms on the Maximum Per- missible Exposure to Microwaves, in the Light of the Author's Own Research," MEDICINA PRACY, Vol 15, 1964, pp 69-75. 14 GOVERNMENT USE ONLY Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7 GOVERNMENT USE ONLY 30. "On the Biological Effect of RF Electromagnetic Fields," in "Trudy Laboratorii. Elektromagnitnykh Foley Radiochastot Instituta Gigiyeni Truda i Professional'nykh Zabolevaniy AMN SSSR" (Transactions of the Laboratory of RF Electromagnetic Fields, Institute of Labor Hygiene and Occupational Diseases, Academy of Medical Sciences USSR), Moscow, 1964. 31. 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M., and Iisenburg, M., "Preliminary Results of Studies on the Lent i.cu.loU Effects of Microwave Radiation," Vol 1, New York, I'le:rum Pres , 1~r~1. 47. Zubi ik, 3. , a repr;i t of the Research Institute of Post and Tele- ccrununicat.ions, 1970, on a partial task in 1969. COPYRIGHT: State Publishing House for Public Health Literature, Prague, J.?7 1014 CSO: 831? /;)/+1b Declassified in Part - Sanitized Copy Approved for Release 2012/05/10: CIA-RDP88BO1125R000300120013-7