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  1. (EST PUB DATE) INVISIBLE PHOTOGRAPHY AND WRITING, SYMPATHETIC INK, ETC.

    CREST Secret Writing CIA-RDP11X00001R000100010003-7 RIFPUB U 2 November 3, 2016 August 1, 2011 3 NOTES Attachment Size CIA-RDP11X00001R000100010003-7.pdf 220.04 KB Approved For Release 2011/08/01: CIA-RDP11X00001 R000100010003-7 ~._. ~b o^ o-a ouy ~ p~Q&g ...

  2. (EST PUB DATE) SECRET WRITING

    CREST Secret Writing CIA-RDP11X00001R000100010002-8 RIFPUB C 1 November 3, 2016 August 1, 2011 2 REPORT Attachment Size CIA-RDP11X00001R000100010002-8.pdf 47.18 KB Approved For Release 2011/08/01: CIA-RDP11X00001 R000100010002-8 CONFIDENTIAL kt:y.:tF JWED ...

  3. MISC RE HOW TO OPEN SEALED LETTERS

    CREST Secret Writing CIA-RDP11X00001R000100010001-9 RIFPUB C 6 November 3, 2016 August 1, 2011 1 MISC Attachment Size CIA-RDP11X00001R000100010001-9.pdf 377.7 KB EXEMPT from automatic declassification Approved For Release 2011/08/01: CIA-RDP11X00001 R0001 ...

  4. GERMAN SECRET INK. FORMULAS USED IN PREPARATION OF. SOURCE-N.G.

    CREST Secret Writing CIA-RDP11X00001R000100010006-4 RIFPUB U 3 November 3, 2016 August 1, 2011 6 MISC Attachment Size CIA-RDP11X00001R000100010006-4.pdf 104.52 KB Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010006-4 ation of. Source- B.G. N. 4 ...

  5. MEMORANDUM TO FRANK V. MARTENEK FROM AMHEINZELMANN RE SAMPLES MOST SUITED ON YOUR LIST

    CREST Secret Writing CIA-RDP11X00001R000100010004-6 RIFPUB C 1 November 3, 2016 August 1, 2011 4 MEMO Attachment Size CIA-RDP11X00001R000100010004-6.pdf 45.84 KB Approved For Release 2011/08/01: CIA-RDP11X00001 R000100010004-6 ADDRESS REPLY TO BUREAU OF S ...

  6. GERMAN SECRET INK. FORMULAS USED IN PREPERATION OF. SOURCE- N.G.

    CREST Secret Writing CIA-RDP11X00001R000100010005-5 RIFPUB C 1 November 3, 2016 August 1, 2011 5 July 12, 1954 MEMO Attachment Size CIA-RDP11X00001R000100010005-5.pdf 45.88 KB Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010005-5 [See Paragraph ...