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- catalog contributor b2151086.
- catalog created "1939.".
- catalog date "1939".
- catalog date "1939.".
- catalog dateCopyrighted "1939.".
- catalog extent "[i]-vi p., 1l. [1]-230p., 1l.".
- catalog issued "1939".
- catalog issued "1939.".
- catalog language "eng".
- catalog publisher "Boston, American Photographic Publishing co.,".
- catalog subject "Ciphers.".
- catalog subject "Cryptography.".
- catalog title "Elementary cryptanalysis; a study of ciphers and their solution ... Sponsored by American cryptogram association.".
- catalog type "text".