SM U-9 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SM U-9" in English language version.

refsWebsite

Global rank English rank

2,553^rd place

1,888^th place

low place

3^rd place

books.google.com

Farquharson-Roberts, Mike (2014). A History of the Royal Navy: World War I. I.B.Tauris. p. 8. ISBN 978-1-78076-838-0. Retrieved 1 December 2014.

Helgason, Guðmundur. "WWI U-boat commanders: Otto Weddigen (Pour le Mérite)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 13 March 2015.
Helgason, Guðmundur. "WWI U-boat commanders: Johannes Spieß (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 13 March 2015.
Helgason, Guðmundur. "Ships hit by U 9". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 19 February 2014.

"Sinking of HMS Aboukir, Cressy and Hogue by U-9". World War 1 Naval Combat. Retrieved 27 May 2007.