TY  - BOOK
AU  - KIPPENHAHN, RUDOLF
TI  - Code Breaking: A History and Exploration
U1  - 005.82 
PY  - 1999///
CY  - Hyderabad
PB  - Universities Press ( India )
KW  -  SHUFFLED TEXTS
KW  -  HIDDEN MESSAGES AND CODEBOOKS
KW  - COMPUTER SCIENCE
ER  -