TY  - BOOK
AU  - Sinkov,Abraham
TI  - Elementary cryptanalysis ;: A mathematical approach
U1  - 652.8 
PY  - 1968///]
CY  - [New York]
PB  - Random House
KW  - Cryptography
KW  - Ciphers
N1  - Bibliography: p. 184-186
ER  -