BATTLE OF THE ATLANTIC AND SIGNALS INTELLIGENCE (Author) SYRETT, DAVID (Author) PUBLICATIONS OF THE NAVY RECORDS SOCIETY; VOL. 139 (Author) Ashgate Publishing (Publisher)
BATTLE OF THE ATLANTIC AND SIGNALS INTELLIGENCE (Author) SYRETT, DAVID (Author) NAVY RECORDS SOCIETY (Author) PUBLICATIONS OF THE NAVY RECORDS SOCIETY; 144 (Author) Ashgate Publishing (Publisher)