Secret warfare : the battle of codes and cyphers /

Bibliographic Details
Main Author:	Norman, Bruce
Format:	Book
Language:	English
Published:	Newton Abbot, Devon : David & Charles Publishers ; [1989]
Series:	David & Charles military book. Battle standards (Newton Abbot, England)
Subjects:	Cryptography > History. Military intelligence > History. Ciphers > History.

Description
Item Description:	Includes index.
Physical Description:	187 pages : illustrations, maps ; 20 cm.
Bibliography:	Includes bibliographical references.
ISBN:	0715394568 :