Secret and urgent ; the story of codes and ciphers.

Bibliographic Details
Main Author:	Pratt, Fletcher, 1897-1956
Corporate Author:	American Cryptogram Association
Other Authors:	Lamb, George C. Collection
Language:	English
Published:	Garden City, N.Y. : Blue Ribbon Books, [1942]
Subjects:	Ciphers. Cryptography.
Physical Description:	282 pages, 3 leaves : diagrams ; 21 cm
Format:	Book

Secret and urgent ; the story of codes and ciphers

Authors: Pratt, Fletcher, 1897-1956
Published: The Bobbs-Merrill Company, 1939

Physical Description: 282 pages ; 25 cm

Book