SM UB-18 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SM UB-18" in English language version.

refsWebsite

Global rank English rank

1books.google.com

3^rd place

3^rd place

2,553^rd place

1,888^th place

books.google.com

Rössler 1979, p. 64. Rössler, Eberhard (1979). Die deutschen U-Boote und ihre Werften: eine Bilddokumentation über den deutschen U-Bootbau; in zwei Bänden (in German). Vol. I. Munich: Bernard & Graefe. ISBN 3-7637-5213-7.

uboat.net

Helgason, Guðmundur. "Ships hit by UB 18". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 December 2014.