German submarine U-231 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "German submarine U-231" in English language version.

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

uboat.net

  • Helgason, GuĂ°mundur. "The Type VIIC boat U-231". German U-boats of WWII - uboat.net. Retrieved 26 July 2012.
  • Helgason, GuĂ°mundur. "War Patrols by German U-boat U-231". German U-boats of WWII - uboat.net. Retrieved 26 July 2012.