TY  - BOOK
AU  - Pratt,Fletcher
AU  - Lamb,George C.,Collection
ED  - American Cryptogram Association.
TI  - Secret and urgent: the story of codes and ciphers
PY  - 1942///
CY  - Garden City, N.Y.
PB  - Blue Ribbon Books
KW  - Ciphers
KW  - Local
KW  - Cryptography
ER  -