SM UB-131 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SM UB-131" in English language version.

refsWebsite

Global rank English rank

2,553^rd place

1,888^th place

3^rd place

books.google.com

Helgason, Guðmundur. "WWI U-boats: UB 131". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 13 February 2009.
Helgason, Guðmundur. "WWI U-boat commanders: Gerhard Schulz". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 11 March 2015.