TY  - BOOK
AU  - FRIEDMAN William F
TI  - Advanced military cryptography
SN  - 0894120115 (pbk.)
PY  - 1976///
CY  - Laguna Hills, Calif.
PB  - Aegean Park Press
KW  - CIPHER MACHINES
KW  - CODE SYSTEMS
KW  - CODES
KW  - CRYPTOGRAPHY
KW  - MILITARY INTELLIGENCE
ER  -