TY  - GEN
AU  - Friedman, William F.
TI  - Elements of cryptanalysis
SN  - 0894120026
U1  - 005.82,FRI 
PY  - 1976///
CY  - California
PB  - Aegean Park Press
KW  - Cryptography
N1  - Part 1: The Analysis of Ciphers (Page-6), Part 2: The Analysis of codes (Page-84-91)
ER  -