SM U-139 (English Wikipedia)

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

refsWebsite
Global rank English rank
2,553rd place
1,888th place

uboat.net

  • Helgason, GuĂ°mundur. "WWI U-boats: U 139". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 7 December 2014.
  • Helgason, GuĂ°mundur. "Ships hit by U 139". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 7 December 2014.