TY  - GEN
AU  - Gaines,Helen Fouch�
TI  - Cryptanalysis: a study of ciphers and their solution - (E-Book)
T2  - Dover books on chess and checkers
SN  - 0-486-20097-3
U1  - 652.8 
PY  - 1956///
CY  - New York
PB  - Dover
KW  - E-Book
ER  -