TY  - GEN
AU  - Kahn,David
TI  - The codebreakers
SN  - 0297767852 :
U1  -  005.8,KAH 
PY  - 1974///
CY  - London
PB  - Weidenfeld and Nicolson
KW  - Cryptography
KW  - History
N1  - The Pagent of Cryptology (Page-71), Paracryptology (Page-895), The New Cryptology (Page-969)
ER  -