TY  - BOOK
AU  - Smith, Laurence Dwight
TI  - CRYPTOGRAPHY
U1  - 652.8 
PY  - 1955///
CY  - N. Y.
PB  - Dover
KW  - Cryptography
KW  - Cliphers
N1  - An Unabridged Republication Of The First Edition With Corrections
ER  -