Secret warfare ; the battle of codes and ciphers.

Bibliographic Details
Main Author: Norman, Bruce
Language:English
Published: Washington : Acropolis Books, [1973], [©1973]
Subjects:
Cryptography > History.
Ciphers.
Physical Description:187 pages : illustrations ; 23 cm
Format: Book
Description
Call Number:Z103 .N67 1973
Bibliography Note:Bibliography: pages 177-179.
ISBN:0874916003