TY  - BOOK
AU  - Klima Richard
AU  -  Sigmon Neil
TI  - Cryptology: Classical and modern
SN  - 9781138047624 (HBK)
U1  - D65,8(B), Q2;Q9 
PY  - 2019///
CY  - Boca Raton 
PB  - CRC press     
KW  -  Hill ciphers
KW  -  Transposition ciphers
KW  -  Turing bombe
KW  - Mathematics
N1  - Bibliography 435-436p.; Index 469-482p
ER  -