TY  - BOOK
AU  - Singh, Simon
TI  - The code book: the science of secrecy from ancient egypt to quantum cryptograghy
SN  - 9780385495325
U1  - 652.809 21st
PY  - 1999///
CY  - New York
PB  - Anchor Books
KW  - CRYPTOGRAGHY-HISTORY
ER  -