TY  - BOOK
AU  -  Kahn David
TI  - The Code Breakers : The Comprehensive History of Secret Communication From Ancient Times To The Internet
SN  - 0684831309
U1  - 652.8 KHA 
PY  - 1967///
CY  - New York 
PB  - Scribner
KW  - Secretarial Aids & Training / Intelligence & Espionage / Linguistics
ER  -