TY  - BOOK
AU  - Sinkov, Abraham
AU  - Irwin, Paul L.
TI  - Elementary cryptanalysis a mathematical approach
T2  - New Mathematical library
SN  - 0883856220
U1  - 005.82,D,sin 
PY  - 1966///
CY  - Washington D.C.
PB  - The mathematical association of America
ER  -