Type U 139 submarine (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Type U 139 submarine" in English language version.

refsWebsite

Global rank English rank

6^th place

6^th place

2,553^rd place

1,888^th place

archive.org (Global: 6^th place; English: 6^th place)

Williamson, Gordon; Palmer, Ian (2002). U-boats of the Kaiser's Navy. Osprey. pp. 16. ISBN 1-84176-362-4.

uboat.net (Global: 2,553^rd place; English: 1,888^th place)

"Ships hit by U 139". Retrieved 8 August 2018.