PROPOSAL FOR STUDY OF INTERACTION OF ELECTROMAGNETIC AND ACOUSTIC WAVES IN AN IONIZED MEDIUM

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP67B00341R000800060001-6
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 22
• Document Creation Date: December 23, 2016
• Document Release Date: July 8, 2013
• Sequence Number: 1
• Publication Date: January 5, 1960
• Content Type: REPORT

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G-99
PROP0aA7J FOR STUDY 07
INTERACTION OF ELEgTROMAGNETIC AND
ACOUSTIC WAVES IN AN IONIZED DEDIUM
5 Jaawry 1960
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MEL'S CV CCM
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ABSTRACT iii
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AP PENDI X "A"
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.6.13STMCT
"Radio-scoustic interaction" relates to the interaction that
occurs between radio liai.re:s and acoustic was in an. ionized or partially
ionized ga.so Theory defines the general character of such interactions,
with or-. w5..thout magnetic fields in the medium, A. modulated to wave
can produce an acoustic disturbance which can react, in turn, eithe.r on
the original wave or on mother radio. wa-o-kt traversing the &raso ax=stic
wave of my type whntelmr can modulate a radio wave in the medium. The
proposed program involves two separate approaches, one mainly theoretical
and the. other expel-inmate:to The /study is to include, in addition to basic
research, a technica_l evaluation of the various types of raclio.,aeoustic
interaction as a practical means a reconnaissance, detection, or defense?
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,
PROPOSAL FOR STUDY OF INTERACTION OF ELECTROMAGNETIC
ADD ACOUSTIC wAns IN AN IONIZED MEDIUN
? I NTEODUC ?ION
It Is well known that, in an ionised gas, a radio wave interacts
with the electrons and ions, especially with the Grr since they are:
lighter and thus more sub lect to the accelerating effects a the eleerric
field? In general, the index of refractIon of the Eteiu proves to be com-
p/ex so that radio waves traversing it tare subject to absorpt.ion aa aIi
as to bending? The conventional thcor.y of ? the propsgatien of a radio wave
in the, ionospb.ere depends upon certain Implicit aasumptlens? The ionised
medium is assumed to be quiet, undisturbed by acoustic waves or mechanical
vibrations of any sort? The wergy of the Oectromagnetic waves is assumed
,
to be negligible, so that it does not appreciably change the temperature or
mechanical state of the medium. The only effect treated censiSts of the
instantaneous interaction between the elect tic wave and the electrons
at any given position*
A preliminary analysis of a leas restrieted model, by Hensel and
Layzero has disclosed the eziatence Of a nutber of, hitherto unrecognized
phenomena* /n an ionized gas, a radio wave my interact with the electrons
_
and ions and actually change the Physical characteristics of the
The electron velocity during the interactiOn mai. no longer be Dianwelliano
although in some instances it can be descritind ef fectively azyseilian at
. .
an electron temperature differon.t from that. the ions or neutral atomso
The effect de.pends? of course, on the G eZ ay tae incident wave.s, And
the phase of the disturbance relative to tint a,he incident wave depends
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on a number of factors such as the modulation frequency and the collision
frequency.?
One may props rly describe the phenomenon in terms of electromag-
UInetic waves traversing the medium and setting up &coos tic waves in the
ionized gas. The. acoustic waves, in turn react on the electromagnetic
waves, producing or altering their modulation. The presence of a permanent
magnetic field in the medium also markedly affects the interaction.
The best known phenomenon that can be described in the above
general terms is the so-called Lultembour:5effeatz the interaction of a modu-
lated radio wave upon a second unmodula tad one via the acoustic field gen.
erated in the electron gas by the original modulated wave. But the basic
analysis is Ear more generale It shous that a radio wave can interact with
itself by means of the acoustic field? Or an acoustic field however pro-
duced, may modkilate any electromagnetic wave traversing the medium?
Figure 1
2
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Figure 1 illustrates, schematically, a well knaan phenomenon, the
Luxembourgeffect. A radio station at A sends cut an unmodulated signal, CW,
on some frequency that is reflected from the ionosphere at B and finally
veceived at Co Thio signal is sometimes termed the "wanted" wave, A trans-
mitter At D, usually near the midpoint of the path, is radiating a modulated
signal on a different frequency. Under certain conditions this signal,
termed the "disturbing" or 'summated" wave, modulates the wanted wave, so
that the unwanted signal is received at C on the previously unmodulated
WaVOQ
The basic principles of the interaction are fairly well understood,
? 1
because of fundamental west by Bailey and Martyn The wanted wave, during
its esage through the ionosphere, suffers a certain amount of aboorption
uhone magnitude depends on the electron collision frequency, V 0 the gyro
frequency (determined by the genera/ magnetic field), in addition to the
radio frequency, 64.10 Bailey and Martyn allowed that the disturbing signa/
could alter the physical state of the ionosphere:: for example, the electron
temperature and the frequency of electron collisions, This change would
alter the absorption coefficient? Hence the wanted radio wave would be sub-
ject to absorption at the modulating frequeneyo,w 0
Menzel and Layeer have shown that the main features of Bailey and
Martyn's analysis follow directly from several simplifying assumptions and
a linearization of the equations that gives an erroneous formula for the
depth of the transferred modulation. It is proposed that these limitations
be removed and that the whole problem of radio-wave interaction in an ionised
medium be re-studied, Potential practical applications of the results and
an eaperimental program shoi4d be suggested,
79 A9 Bailey and D. F. Marten, Phil. Mag., 16, 369, 19344
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17:
An acoustic disturbance mry arise from one of many sources: the
explosion of a bomb cr similar device in the medium, the chock and noise
waves produced by a moving rocket or projectile, an audio disturbance from
a sound transducer in the medium convection or turbulenee occurring nat-
urally in the medium, irregular flow accompanying compression or dilatation
of the medium by external forces such as an encounter of the ionosphere with
solar ion clouds. The study suggesta ney ways, of observing physical condi-
tions in the ionized =atom by virtue of induced moemlation on radio wavesc
This proposal includes suggestions for theoretical study of
acoustic interaction. The first step represento compLation of the elemen-
tary theory, to derive the actual velocity distribution of the electrons as
a function of time, radio frequency, modulation frequency, collision fre-
quency, and related physical parameters. The second step should extend the
analysis to include the effects of gyro-frequency interaction resulting
from the presence of a permanent magnetic field. Third, an experimental
program should be initiated, to devise physical means of produning acoustic
fields, together with various means of checking the theory and gathering
information about the physical state of an ionised gas subjected to an
acoustic disturbance.*
4
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IL DISCUSSION
The conventional theory a radio propagation in an ionised medium
implies the absence of acoustic disturbances? The medium is &saunas:1 to be
static and unaffected by the waves traversing it, except for an instantaneous
interaction between the electrons of the medium and the implied electric
field of the radio waves. Most of the characteristics of radio wave prope.ga.
tion, such as critical frequency, r.P..a.ki.mum usable frequency, absorption coefc
ficient? etc., can be predicted on the basis of this assumption
However? if the radio wave is sufficiently powerful to produce
mchanical oscillations in the Lonosehere, the cirdinary propagation equations
do not apply? We have inotead a modified form of the equations? which in..
elude terms that can be described as magaetohydrodynasic in charaeter,
The equations describing oscillations in the medium do not separate
into two distinct Sets, ate descriptive of electromsgeetic and the other of
acoustic phenomena as they do ettert the median is netitrel, The presence of
ions and associated electrons leads to coupling between the two varieties
Of disturbance.. A magnetic field: if present? augmeets the coupling which
attains a maximat when the frequency of the radio wave equals the gyro-fre-
quency of the magnetic field, As a result of the interaction, an acoustic
disturbance may cross-stodulate a radio wave traversing the medium&
The effect cam be described as an interaction between at electro-
magnetic wave and acoustic waves in the =dime or vice vercao A theoretical
analysie of the phenow.na involved has many useful and interesting applica-
tions.
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,
Let this electric field of the incident wave be
13 ? =,--? 130 WS (A) t 008 JO. t
wheE3 W, is the carrier frequency and the modulation frequency. The
first stage of the analysis leads to results 'analogous to but more general
thano those derived by .V0 Bailey and D, L iartyn in a study of the
Luxembourg effect. These conventional results are based on the implicit but
nonetheless restrictive assumption that the interaction is independent of
the modulation frequencyoy-A-0 This assumption holds strictly only for very
low values of /..1..0 for example *Alen /.t. is lees than 150 cis. The second
implicit assumption that ono can neglect changes in the physical state of
the ion gaso appears to be justified?
i.et.Q-denote the mean thermal energy c electron, w the mean
rate of heetng (per electron) by the radiati:en 'field, and E the mean rate
-
of cooling (per electron) by collisions tolov.i t4?: 'os molecules. All of these
quantities are fictionsof the time and cdesC?ribable by the differential
equation representing the energy balance
dQ/iit
For any given electric field, we know we if we can find haw depends on Q0
we can proceed to the solutionp Linearization of the equations coupled with
an assumed relation between Q and the collision frequency, o determines
Q as a function of the umgaitude of the impressed modtlIsted field.: This
??????????????Ma us* a h. C/N.,?????? L11????????141l. .11131411.01
V. A. Bailey end D. F. Martyn, Nag" 1 369, 19340
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leads, in tmn0 to an estimate of the depth of modulation of the elcctromag.
rmtic wave.
The maiz. restriction of tte abwe conventional theory lies in the
fact that Q, 0 and R are quantities averaged over a velocity distribution
of the electron gest, f(t), where q is a velocity and t the timee If we
can deterteires the velocity distribution as a function of the tie, m can
get a leech clearer picture of the physical state of the medium. A detae; led
study proves that the depth of modulation as rzeeficted by the simple theory
provec to be incorrect.
One eml utae a start by using the Boltzmann transport equation, in
connection with Mareellts standard equations for the electromagnetic field.
The transport equation leads to a non-linear differential equation of the
second order, which can be reduced to the following comparatively (Ample fore:
i CX y = [(X..i) 70 4. zle n3/2 ell
where "dashes" indicate derivatives with respect to i. In the above eve.
tion0 y represents: the itiatantaneons net energy: flux across a given surface
by all electrons elose velocity is equal to or Is than q. And It represents
the energy of an electron movie% with velocity q, Both y and ez have been
reduced to &tmensionless form by division with values averaged with respect
to time.
The perameter r is defined on the assumption that the collision
frequency V depends on the velocity q through a power law
1) -
7
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which defines both r end Vo? Also,
cr m
2 yo
where etc- is the modulatioe freqroreng....ye 14 and m are the masses of the neu-
tral atems a-Id the fres electrons? reseective/y. The quantity, i, has its
towel significance, the 'square root of 4d
This equation has not been solved concept under some special, lim-
iting conditions? The detailed solution, tabulated in teros of Vim two ad-
juetable parameters? ge and r, is the most urgent need? This will deter-
mine the distribution of electron velocities as a function of time ax d thus
enable us to calculate directly the physical characteristics of the medium?
This analysis will establish a firm basis for further study of the phenomenon
radio-acoostie interectiot4
The second step, and one urgently needed, is the extension of the
analysis .to include the effects of a prmanent magnetic field in the medium,
At least 'four basic frequencies are involved: the radio or carrier frequency-
C00. the audio or modulated frequency /Ao0 the gyro or Larmor frequency 0
and the .collision frequency Yo
The study should include, in addition to further improvement of
the. lencembourg effect, an analysis of other allied phenomena of radio wave
interaction., The "Inverse Ix. senbourg affect", s?oerein the wanted and int-
wanted waves change places, .is one example* The case of self-modulation or
self-demodulation tow also be relevant. The possible interaction of Ere.
qw.ney modulated waves has also not been previouely discussed*
For sake of completeness, the stu.dy should eo-emine the feasibility
of carrying out experizosents to test the theory or to determine various
8
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phydcal characteristics of the ionized gas, A number of experiments are
possible, of which the fo/lowing is repnmsentative and perhaps the simplest.
Suppose that the nose of a rocket contains a iew-poemred transmitter, ?pare.
ating on frequenceo in the rm.ge from about 1.04 to 205 racfsec0 The gyro
frequency of the ionosphere, for intermediate latitudes will tend toward the
former vainee However?Lu the -pesence of mechanical disturbances, possible
c.emer.ession of the medium orpc-eduction of additional ionization snay increase
the g :3reo-frequency appreciably? Any rodzet or missile traversing the iono-
sphere will set up acoustic vibrations which, by virtue of the expected non-
linear interaction? can be er.pected to transfer acoustic modulation to the
beam from the nose cone. One may encounter difficulties, however, in dis-
tinguishing between the 'expected lcreefrequency maplitude modulation and the
variation of signal strength. caused by changing aspect of the rocInto
' Alternative varieties of ionospheric disturbances? including those
produced by disruptions similar to that of An 'Aron effect's are relevant?
The study may include the effect of normal acoustic noise existing in the
LoflO8Cte0 such as that produced by corveetion or turbulence as it may
interact with electromagnetic waves ..traversing the pied/xis?
The existence of radio-ereoustiti, ':interaction has been demonstrated
experiumentally as well as theoretically. It is related to the well known
_
Lux=bourg effects where the acoustic field induced by a powerful modulated
radio wave serves to modulate another radio wave. The cross-modulations
Which results frcen fluctuations in the absorption coefficient of the ionized
layers depends on the audio frequency ? A second and closely related pheno-
mnon is self-modulations the interaction of a modulated radio wave with its
own acoustic disturbance This interaction may increase or decrease the
9
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original modulation, by an amount dependent on the audio frequency*
The Luxembourg effect definitely needs a thorough quantitative
study to determine the basic facts of audio-radio wave interaction* This
study requires the construction and operation of equipmemt to measure the
percentage modulation at different audio end radio frequencies?
The power dependence of the interaction is as yet completely un-
determined, in view of the fact that the "unwanted" wave has been taten from
acme existing station. Additional significant information will become avail-
able if the power of the "unwanted" beam can be varied as desired? The
studies should include the effects of self-modulation as well as ordinary
wave interaction?
Unless special efforts are made, the energy imparted to the acoustic
field by the electromagnetic wave is small? The interaction is appreciable
because a large volume is affected. The passage of a rocket or missile
through the ionized medium creates a Shock yeas or major disturbance, which
can appreciably affect the physical state of the medium, changing the gyrc-
frequency as well as producing a strong acoustic pulse* Explosions, atomic
or otherwise, can cause similar disturbances* The question to be investiga-
tad? by both ezperimental and theoretical means, is the detailed character
of the possible interactions between the acoustic disturbance and an elec-
tromagnetic wave? Specie ically D what information can one expect to obtain
from the signal received from such a region? Cart' this phenomenon be used
for intelligence, reconnaissance or for the detection of ionospheric distur-
bances of artificial origin?
? Experiments with rockets or missiles can give valuable data con-
cerning the interaction between a radio wave and an impulsive acoustic dis-
turbance produced by the vehicle One example of a variety of experiments
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LI
that could be performed in this field is given below, This particular ez.
periment was proposed by Menzel in 1949 and instrumented in an Air Force
experiment carried out at White Sands Proving Ground, Unfortunately, the
rocket, one of the last of the old Wes, aborte& The experiment was never
repeated,
The procedure calls, first of all, for a transmitter operating in
the nose of the rocket and radiating CW on or near the expected gyro-frequency
of the ionosphere. It is expected that the audio impulse of the shock wave
will modulate the rocket signal that has to pass through the wake of the
missile. Varying the radio frequency will give important data concerning
the nature of the wave interaction?
Experiments have shown that radio waves, tuned to the gyro-frequency
of a magnetic field, can produce luminosity in an evacuated bulb at consid-
erable distance (half a kilometer or more) from a transmitter? The voltage
is fed from an antenna to condenser plates so set that the electrie field is
perpendicular to the internal magnetic field? Tests have shown that even
very low powers can yield appreciable luminoaity?
In the primitive form, the luminous globes have potential practical
application, such as providing illumination to an area not yet wired for
electric current? But the principle, if intensified, has additional prac-
tical applications? Calculations indicate that semi-directed radio bean60
operating at the terrestrial gyrb-freqtenck? couldapprciablY enhanie te
electron density already present` in the, ionosphere? fluid there is also the
possibility that, with sufficient energy,, a glow discharge could be initiated,
resulting in an artigicial air
be of great prnctiCal benefit,'
I
glow or auroraD The enhanced ionization could
pert44tiiig communication on frequencies much
higier than the ionosphere would normally sus tain?
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Finally at the ultiunte limit a high pmyero there is the den-
nits question that still requires an answer') Could a focussed radio beam
be used to destroy or render inoperative any rata/lie object it might en-
counter? Her,e the it study to be underfelt/an is isrEr,ely theoretica/0 To
answer such questions as the degree of heatingo the effect of chock waves
on gyro-froquetcyo tald so on such enpariments might ba done with the sid
of the down.range facilities of Atlantic Missile Testing lamp? Cape Canaveral?
Florida, with observations on signals to end from missiles?
1?
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hID STAMM' OF WORK
The contractor shall furnish the necessary personnel, services of
others facilities, and materials and shall use its best efforts to perform
the follewing:
1, Extend the theory of radio-acotstie interaction to include
the effects of such phenomena co:
(a) non-jMaxwel tian distribution of electron velocities;
(b) the heating of the medium by the presence of acoustic
and electromagnetic waves;
(c) the interaction between electromagnetic and acoustic
disturbances;
(d) the interaction between e/ectromegne tic waves and shock
waves;
(e) extension' of the analyses to inclUde-the effects of meg.
netic fields in the medium;
. ?
,(f) the effect of electromagnetic waves already present in
the medium on the nature of the interaction, particularly through the medium
of the gyro-frequency; and
(g) the frequency distribution of electromagnetic radiation
induced by acoustic d is turbances
2, Carry out sys tematic experiments to investigate the specie is
phenomena of radio-audio interaction, with specific relation to the theory
detailed above
(a) determine the frequency and power dependence of cross-
modulation in the Lu=embourg effect;
3
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(b) determine the nature of self-interaction in a modulated
radio wave;
(c) investigate the nature of the interaction of radio waves
with acoustic disturbances of various origins;
(d) determine the relationship between this interaction in
the presence of magnetic fields;
(e) study the luminosity induced in evacuated globes rath the
aid of electromagnetic radiation fed to crossed electric and magnetic fields
at the gyro -frequency;
(e) study the effect of gyro-interaction on radio waves emitted
by missiles penetrating the ionosphere, as perturbed by the shock wave pro-
duced by the missile; and
(g) from the foregoing experiments and theory, determine the
feasibility of causing excess ionisation in the ionosphere, as the result of
radio waves incident on the medium*
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APD IX "A"
TYPICAL SENIOR. PERSONNEL
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6 AP:11-196o
MEMOMANDUN
SWAM Use of the "Luxembourg Effect as a Missile Launeh
Detection Technique
1.. This nemerandsm presents a recemmendatien for action by the
on the initlition of ? technical surveillance project. This
reeammendatien is presented in.pareeraph 5.
a. Background: The lluxembourg Violet?, more precisely' termed
"ionospheric arose modulation", is first observed in 1533 vben reception.
at Sidenhoven, Netherlands, of a breedcest rem Deromester, Switzerland,
was frequently disturbed by ? weak backgreued of a program true& radio
station in Luxembourg. This interference is not due to defect" in the
reesivers, ar to local disturbance*. The svegestion vas mede,that it
vas due to interaction between the two radio wave" as therms.'
-through the ionosphere: evidence secumnlated vividly to thew that the
phenomena did exist and vas meet marked vben the desired breedeast
signal vss ? medium ,s received by ionospheric propagation end the
disturbing signal vas generated by a high powered long vim station
located ecee-Vbere neer the midpoint of the transmission path of the
medium rave signal. Limited investigations of the effect continued
througbilerldWar II vben the cress modulation technique vas used as a
tool for ionospheric research. Det such direct aleplicatien of the
principle has been mode since these experiment'.
3, The need for more information regarding the Soviet
!dulls test promise has preemptet the suggestion that the above mentioned
"Lvannfteov1214et" be. utilised as &missile launeh detection? technique.
liitheaultible(30.100,zoilumwave-tireaadtter-leustad-in
The area os
located at the miespalmt of the transmiesion path am& therefere gravies
? maximum telmeeNbaatiomidleterbenee. (Seldsnee imileated thet mewing
the disturbing signal aeures as little as 300 miles either varfrom the
trebigitS100 midmpalat will result in a decrease is cress modulatica as
creates 90 per cent. The reception of 90 SW medium freqesney signals
over ranges of 4,000 all.. requires no special tedhniques sad is flirly
'penmen pleat during winter nights. Atmospherics vill probably limit
the system's usefUpees during the summer meths.) The missile itself
vill provide the modulatioisignal. There is strong evidenae that
UI.. 13* penetrptieg the ionosphere sets up low frequeney disturbances
in it vhich should resells in modulation of a medium frequency vans
incident on the lohomeibere at the point.ef.penetration.?DeteetienW''-.
this mediae frequently broadcast sigma end. its modulation would be
enhanced with regard-tc.ether interfering signals if a directions'
Adcock antenna verensed-st the receiving site. .
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/ ?
7 "
,
Mknt -
fopI (late& 6 4011?1960
ettbjt Use or tb--litsuoishourg arteet* siva ?*tattle Lunch Ilstectlan
Tesbnieres ?
4. It is thereftere ;Imam& that a earls. of
feasibility be sartastal odor relatively eantrellall ass-
titter wire% kit a.U. lawasehea. A sear Steel geographic set-up
is provide& by lasting a transmitting and reseiving ilisatty on a line
running throve* the-point of lemosplierie peastreties of missiles
leunahad at Ospe Oanaveral. The less site, at which Met ot the
work is to be 4 to eto shoal be legate& blailly
in
tryussei
necessarily be as fez southwest of the pamotration pOint as is ? STAT
to the northeast. 'offers' snob ? layettes. The remises's
of the transadtter al** the advantages -et alaulislielt the
streets of ? Wilt mare& kreadesst trenemitter in legal toseleast ?
reeeptien. Oen doves or treaded will be nesessery is shaming the
exPevivestal test treauebeles aM the propagatiesi aress.
It is Motherpriposel that the antes be lastryseestet to
provide reeserellants of at two partied., pbamemene. the first
of these ls the varieties of the anplituda of the imiNivsi 04,101
streagils with time. We West might be determinist ?reoording the
A008 'Olt.js ef theressiver with sufrieiant -tine ,reeoltittion
aM
4E81110 Mee IN 1111?V lleariatnaties between neisal;lestise eopLituiles
sad Mating rates and thew that sei esswalatill witlimialle firings.
?? ? ?
- Teeesmiletemet Ito be Mason& is layet et plisse shims** by
the resolve& 'Aids phase shisipoe (sal asseelatet Doppler !re-
essmoieo):aisy be iiwa:yrestalt of the diateatesee of the soma proppation
path or saf,ertest:'smwstw:,
teas of distbeurr's. ten night be, lastrummstahlen, will rewire
highly stabiliss&-risersiiii Warms *loft the'lressmitter and the
reesiver. -- ? - ?
STAT
Ir the system,, the greater Was* is on the
terminal. Although' pees effects if 'Opal .41stiAhalise.mtgbt be -
observed, there is a euckwastfai bi1i thet"the *Mete' will ?
be see31. Oseeelpseetin reeereles eiei /ate preeeesiag cpiassete
at .be seeable of butellft iles-stavistese *Simla ter-verlove
eorreletleit eel essigeis teeissigoes. ?Pertseateig,"there Ia so, maize-
wet for 1ee3-4W proseeelsgis that tie pregreetsji mega
sake use of teeilities Meth as
. -
tbit rod*P014 istelkion the oreposeeeyeteiAmmeAlleame -
fassibility end my previa ariterls rer aptInisiog the future system.'
Geoids.
Onri - niti7Ad COOV Aooroved for Release 2013/07/08 CIA-RDP67B00341R000800060001-6
STA-
. .?
Declassified in Part - Sanitized Copy Approved for Release 2013/07/08: CIA-RDP67B00341R000800060001-6
liberareneee tie 4latel.6 Voir
thbjs gee et tbOletwesboarg as Illeene Lame Detection
TeebijAllm
tee venaleg
the WI ter epeeittleit tor else year)
ebault lot emetriets threuih the various
millimossemelee to do tho tolloreings
(1) Navy ? Prepare Us transmitter site, install power
gosoratioo, transmitting, eassmmiattioas, and per-
sonal facilities.
(1) Air Poree/AMOO/CMC ? Toehnleal mositoriag of the
pro3set, establialment of a resolving facility at
massing of both the traammitting and
r000lving facilities (by antraotors, if mocassarp),
supervising the data analysis sad feasibility report
preparation.
(3) lien ? Provide the seeessery logistic sweet tor Os
temiemitter tbeatty.
Declassified in Part - Sanitized Copy Approved for Release 2013/07/08: CIA-RDP67B00341R000800060001-6
STAT