TY  - BOOK
AU  - Deavours,Cipher A.
TI  - Cryptology: machines, history and methods 
SN  - 0890063990
PY  - 1989///
CY  - Norwood, Mass.
PB  - Artech House
KW  - Cryptography
N1  - Second vol. of articles selected from Crytologia.  Continues : Cryptology yesterday, today, and tomorrow; Includes bibliographical references
ER  -