Ultra in the Atlantic
Subtitle: The German Naval Grid and Its Ciphers (Intelligence Series , Vol 5, No 15)
Edition: Revised edition
Publisher: Aegean Park Press
Published: April 1996
Format: Paperback
Number of pages: 6
ISBN-13: 9780894122408
Subjects: United States; History: World; Great Britain; History; History - Military / War; World War, 1939-1945; Military - World War II; Europe - Germany; Cryptography; Electronic intelligence