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- 30009074 alternative "Machine ciphers.".
- 30009074 contributor B748769.
- 30009074 contributor B748770.
- 30009074 created "1918.".
- 30009074 date "1918".
- 30009074 date "1918.".
- 30009074 dateCopyrighted "1918.".
- 30009074 extent "2 p.l., 3-58 p.".
- 30009074 issued "1918".
- 30009074 issued "1918.".
- 30009074 language "eng".
- 30009074 publisher "Geneva, Ill., Riverbank Laboratories,".
- 30009074 subject "Ciphers.".
- 30009074 subject "Z104 .F92".
- 30009074 title "Several machine ciphers and methods for their solution ...".
- 30009074 type "text".