TY  - BOOK
AU  - Gardner, Martin
TI  - Codes, Ciphers and Secret Writing
SN  - 9780486247618
U1  - 001.543 GAR 
PY  - 2010///-
CY  - New York
PB  - Dover Publication
KW  - Cryptography
KW  - Code
KW  - Secret Writing
ER  -