SM UB-61 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SM UB-61" 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-boat commanders: Theodor Schultz". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
Helgason, Guðmundur. "Ships hit by UB 61". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.