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- catalog contributor b7782192.
- catalog created "1960.".
- catalog date "1960".
- catalog date "1960.".
- catalog dateCopyrighted "1960.".
- catalog extent "[1]-16 p.".
- catalog issued "1960".
- catalog issued "1960.".
- catalog language "eng".
- catalog publisher "Great Neck, New York,".
- catalog subject "Ciphers.".
- catalog subject "Cryptography.".
- catalog title "Two Soviet spy ciphers, presented at the annual convention of the American Cryptogram Association, New York, September 3, 1960.".
- catalog type "text".