TY  - BOOK
AU  - Gaines, Helen Fouche 
TI  - Cryptanalysis : a study of ciphers and their solution
SN  - 9780486200972
U1  - 005.8 G127c 
PY  - 1956///
CY  - New York
PB  - Dover Publishers
KW  - Ciphers
KW  - Cryptography
ER  -