Notes
- Tarrant , V. E. 1989 . The U‐Boat Offensive 1914–1945 , 100 London Arms and Armour Press .
- Terraine , John . 1989 . Business in Great Waters: The U‐Boat Wars 1916–1945 , 400 London : Leo Cooper .
- Barnett , Correlli . 1991 . Engage the Enemy More Closely: The Royal Navy in the Second World War , 267 London : Hodder .
- Vause , Jordan . 1992 . U‐Boat Ace: the Story of Wolfgang Lath , 99 Shrewsbury, , UK : Airlife .
- Terraine , John . 1992 . Seek and Sink, A Symposium on the Battle of the Atlantic , 8 RAF Staff College, Bracknell : RAF Historical Soc. .
- 31 May 1990 . Führer Conferences on Naval Affairs , 31 May , London : Greenhill Books . 1943
- BdU . Kriegstagebuch (war diary) , 77 (unpub.)
- Brown , J. D. “ ‘Peaks and Troughs in the Convoy Campaign: June 1941 to April 1943’ ” . 5 (unpub.)
- Behrens , C. B. A. 1955 . Merchant Shipping and the Demands of War , 123 London : HMSO .
- 1950, 1952, 1977 . The U‐boat War in the Atlantic , 3 vols , London : Admiralty .
- Barnett . Engage the Enemy More Closely , 276 – 7 . (note 1)
- Hinsley , F. H. 1981–1984 . British Intelligence in the Second World War , Vol.2 , 169 London : HMSO .
- 1957 . The Defeat of the Enemy Attack on Shipping , London : Admiralty .
- Whaley , Barton . 1973 . Codeword Barbarossa , Cambridge, MA : MIT Press .
- 1991 . ‘The Sinking of HMS Firedrake and the Battle for Convoy ON153’ . The American Neptune , Spring : 105 – 111 .
- Kahn , David . 1991 . Seizing the Enigma , London : Souvenir Press .