SM U-135 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SM U-135" in English language version.

refsWebsite

Global rank English rank

2,553^rd place

1,888^th place

uboat.net

Helgason, Guðmundur. "WWI U-boats: U 135". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 29 September 2010.
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 16 March 2015.