German submarine U-7 (1935) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "German submarine U-7 (1935)" in English language version.

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books.google.com

Gröner 1991, pp. 39–40. 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.

Helgason, Guðmundur. "Kurt Freiwald". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Otto Salman (German Cross in Gold)". German U-boats of WWII - uboat.net. Retrieved 11 November 2019.
Helgason, Guðmundur. "Werner Heidel". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Karl Schrott". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Günther Reeder (German Cross in Gold)". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Ernst-Ulrich Brüller". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Hans-Günther Kuhlmann". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Heinrich Schmid". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Siegfried Koitschka (Knight's Cross)". German U-boats of WWII - uboat.net. Retrieved 11 November 2019.
Helgason, Guðmundur. "Otto Hübschen". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Hans Schrenk". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Günther Loeschcke". German U-boats of WWII - uboat.net. Retrieved 20 May 2015.
Helgason, Guðmundur. "Ships hit by U-7". German U-boats of WWII - uboat.net. Retrieved 15 October 2014.