SM UB-109 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SM UB-109" in English language version.

refsWebsite

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books.google.com

Helgason, Guðmundur. "WWI U-boat commanders: Kurt Ramien (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 March 2015.
Helgason, Guðmundur. "Ships hit by UB 109". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 March 2015.

"The Maritime Archaeology of the Dover Barrage". Wessex archaeology on line. Retrieved 1 September 2015.