TY  - BOOK
AU  - Thompson,James Westfall
AU  - Padover,Saul K.
TI  - Secret diplomacy : : espionage and cryptography, 1500-1815
U1  - 327.12 THO P  
PY  - 1937///.
CY  - New York : 
PB  - Frederick Ungar Publishing Co., 
KW  - Cryptography
KW  - Diplomacy
KW  - Political science
N1  - Including Bibliography.
ER  -