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- catalog contributor b2342225.
- catalog created "[c1939]".
- catalog date "1939".
- catalog date "[c1939]".
- catalog dateCopyrighted "[c1939]".
- catalog extent "282 p.".
- catalog hasFormat "Secret and urgent.".
- catalog isFormatOf "Secret and urgent.".
- catalog issued "1939".
- catalog issued "[c1939]".
- catalog language "eng".
- catalog publisher "Indianapolis, New York, The Bobbs-Merrill Company".
- catalog relation "Secret and urgent.".
- catalog subject "652".
- catalog subject "Ciphers.".
- catalog subject "Cryptography.".
- catalog subject "Z104.P92".
- catalog title "Secret and urgent; the story of codes and ciphers, by Fletcher Pratt.".
- catalog type "text".