يو بوت (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "يو بوت" in Arabic language version.

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aftenposten.no

archive.org

  • "Meyers Konversations-Lexikon (1905-1909)" (بالألمانية). Bibliographisches Institut Leipzig. عقد 1910. p. 257. {{استشهاد ويب}}: تحقق من التاريخ في: |date= (help)
  • "Full text of "A North Sea diary, 1914–1918 / Commander Stephen King-Hall"". مؤرشف من الأصل في 2016-03-17.
  • Crocker III، H. W. (2006). Don't Tread on Me. New York: Crown Forum. ص. 310. ISBN:978-1-4000-5363-6. مؤرشف من الأصل في 2019-12-16.

books.google.com

  • Compare: Chaffin، Tom (2010). The H. L. Hunley: The Secret Hope of the Confederacy. Macmillan. ص. 53. ISBN:9781429990356. مؤرشف من الأصل في 2017-04-23. اطلع عليه بتاريخ 2016-07-14. Bauer's boat made a promising start, diving in tests in the Baltic Sea's Bay of Kiel to depths of more than fifty feet. In 1855, during one of those tests, the boat malfunctioned. The Brandtaucher plunged fifty-four vertical feet and refused to ascend from the seafloor. Bauer and his crew – leaving their craft on the bottom – barely escaped with their lives.

etymonline.com

  • "U-boat". Online Etymolgy Dictionary. مؤرشف من الأصل في 2017-07-12. اطلع عليه بتاريخ 2012-06-22.

militaryhistoryonline.com

numa.net

pbs.org

telegraph.co.uk

uboat.net

web.archive.org