Decoding history : the Battle of the Atlantic and Ultra / W.J.R. Gardner; foreword by Geoffrey Till.

Bibliographic Details
Main Author:	Gardner, W. J. R.
Other Authors:	Till, Geoffrey
Format:	Book
Language:	English
Published:	Annapolis, Md. : Naval Institute Press, 1999.
Subjects:	World War, 1939-1945 > Cryptography. World War, 1939-1945 > Electronic intelligence. World War, 1939-1945 > Campaigns > Atlantic Ocean.

Description
Physical Description:	xvii, 263 pages : illustrations ; 22 cm.
Bibliography:	Includes bibliographical references and index.