The German Enigma cipher machine : beginnings, success, and ultimate failure /
Winkel, Brian J.
Boston, Mass. ; London : Artech House,
c2005.
Includes bibliographical references.
Enigma cipher system.
ULTRA (Intelligence system)
World War, 1939-1945
World War, 1939-1945
World War, 1939-1945
World War, 1939-1945