TY  - BOOK
AU  - Winokur,Eric
ED  - Copyright Paperback Collection (Library of Congress)
TI  - Secret codes
T2  - Explorer books
SN  - 0440841542
AV  - Z 103.3 .W776 1990
U1  - HS 794  
PY  - 1990///
CY  - New York
PB  - Trumpet Club
KW  - Cryptography
KW  - Ciphers
ER  -