TY  - BOOK
AU  - Churchhouse, R. F
TI  - Codes and ciphers : Julius Caesar, the Enigma, and the internet
SN  - 9780521008907
SN  - 200103740
U1  - 652.8 CHU 
PY  - 2002///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Ciphers
KW  - Cryptography
N1  - Includes bibliographical references and indexes
ER  -