Notes
- Elliott , Peter . 1977 . Allied Escort Ships of World War II: A Complete Survey , 53 – 61 . Annapolis, MD : US Naval Inst. Press .
- Abbazia , Patrick . 1975 . Mr. Roosevelt's Navy: The Private War of the U.S. Atlantic Fleet, 1939–1942 , Annapolis, MD : US Naval Inst. Press .
- Roskill , S.W. 1954–61 . The War at Sea, 1939–1945 , Vol.1 , 616 London : HMSO .
- Grove , Eric J. , ed. 1997 . The Defeat of the Enemy Attack on Shipping, 1939–1945 , Aldershot, Hants : Ashgate for the Navy Records Society .
- Churchill , Winston S. 1929 . The World Crisis , Vol.IV , 347 London : Thornton Butterworth .
- Roskill . War at Sea , I 453 454 (note 4)
- Hinsley , F.H. 1979–88 . British Intelligence in the Second World War , Vol.II , 167 – 8 . London : HMSO .
- Kahn , David . 1991 . Seizing the Enigma: The Race to Break the German U‐Boat Codes, 1939–1943 , Boston : Houghton Mifflin .
- Hessler , Gunter . 1989 . The U‐Boat War in the Atlantic, 1939–1945 , London : HMSO .
- Vat , Dan van der . 1998 . The Atlantic Campaign: World War II's Great Struggle at Sea , New York : Harper & Row .
- Terraine , John . 1989 . The U‐Boat Wars, 1916–1945 , New York : Patnau .
- Barnett , Correlli . 1991 . Engage the Enemy More Closely: The Royal Navy in the Second World War , New York : Norton .
- Blair , Clay . 1996–1998 . Hitler's U‐Boat War , New York : Random House .
- Bennett , Ralph . 1994 . Behind the Battle: Intelligence in the War with Germany, 1939–1945 , 168 – 201 . London : Sinclair Stevenson .
- Gardner , W.J.R. 1999 . Decoding History: The Battle of the Atlantic and Ultra , London : Macmillan .
- Syrett , David , ed. 1998 . The Battle of the Atlantic and Signals Intelligence: U‐Boat Situations and Trends, 1941–1945 , Aldershot, Hants. : Ashgate for the Navy Records Society .
- Douglas , W.A.B. 1986 . The Creation of A National Air Force , Univ. of Toronto Press .
- Sarty , Roger . 1994 . “ ‘Ultra, Air Power, and the Second Battle of the St. Lawrence, 1944’ ” . In To Die Gallantly: The Battle of the Atlantic , Edited by: Runyun , Timothy and Copes , J.M. Boulder, CO : Westview Press .
- Syrett , David . 1994 . The Defeat of the V‐Boats: The Battle of the Atlantic , Columbia : Univ. of South Carolina Press .
- Hessler . The U‐Boat War in the Atlantic Vol.1 , 79 – 80 . (note 15)
- Rohwer , Jurgen . 1999 . Axis Submarine Successes of World War Two, German, Italian and Japanese Submarine Successes, 1939–1945 , 62 Annapolis, MD : Naval Inst. Press .
- Rohwer . Axis Submarine Successes , 62 (note 45)
- Rohwer . Axis Submarine Successes , 62 (note 45)
- Rohwer . Axis Submarine Successes , 62 (note 45)
- Johnson , Brian . 1973 . The Secret War , 210 – 12 . London : BBC Books .
- Williams , Kathleen Broome . 1996 . Secret Weapon: High‐Frequency Direction Finding in the Battle of the Atlantic , Annapolis, MD : Naval Inst. Press .
- Erskine , Ralph . 1999 . ‘Kriegsmarine Short Signal Systems — and How Bletchley Park Exploited them’ . Cryptologia , 23 Jan. : 65 – 92 .
- Rohwer . Axis Submarine Successes , 62 (note 45)
- Rohwer . Axis Submarine Successes , 62 (note 45)
- Rohwer . Axis Submarine Successes , 63 (note 45)
- Hessler . U‐Boat War in the Atlantic , I 80 (note 15)
- Grove . The Defeat of the Enemy Attack on Shipping, 1939–1945 303 (note 5)
- 1941 . Daily Telegraph , 26 Aug.