xxvii, 612 pages :illustrations, maps
Includes bibliographical references, Internet addresses and index.
LSC40.00
1.World War, 1939-1945--Secret service.2.World War, 1939-1945--Cryptography.3.World War, 1939-1945--Electronic intelligence.4.Intelligence service--History--20th century.5.Espionage--History--20th century.6.World War, 1939-1945--Underground movements.Dynamic Details