German submarine U-568 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "German submarine U-568" in English language version.

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books.google.com

Gröner 1991, pp. 43–46. Gröner, Eric; Jung, Dieter; Maass, Martin (1991). German Warships 1815-1945: U-boats and Mine Warfare Vessels. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
Busch & Röll 1999. Busch, Rainer; Röll, Hans-Joachim (1999). Der U-Boot-Krieg, 1939-1945: Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945] (in German). Vol. IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.

Helgason, Guðmundur. "The Type VIIC boat U-568". German U-boats of WWII - uboat.net. Retrieved 15 August 2014.
Helgason, Guðmundur. "Kapitänleutnant Joachim Preuss". German U-boats of WWII - uboat.net. Retrieved 19 April 2020.
Helgason, Guðmundur. "Patrol info for U-568". uboat.net. Retrieved 20 April 2020.
Helgason, Guðmundur. "Wolfpack Grönland". Uboat.net. Retrieved 20 April 2020.
Helgason, Guðmundur. "HMS Picotee (K 63) (British Corvette)". Uboat.org. Retrieved 20 April 2020.
Helgason, Guðmundur. "Wolfpack Kurfürst". uboat.net. Retrieved 20 April 2020.
Helgason, Guðmundur. "Wolfpack Seewolf". uboat.net. Retrieved 20 April 2020.
Helgason, Guðmundur. "USS Kearny (DD 432)". Uboat.net. Retrieved 20 April 2020.
Helgason, Guðmundur. "Wolfpack Reissewolf". Uboat.net. Retrieved 20 April 2020.
Helgason, Guðmundur. "Patrol info for U-568". Uboat.net. Retrieved 20 April 2020.
Helgason, Guðmundur. "Ships hit by U-568". German U-boats of WWII - uboat.net. Retrieved 15 August 2014.