SM U-9 | references

References

  1. ^ Helgason, Guðmundur. "WWI U-boat commanders: Otto Weddigen (Pour le Mérite)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 13 March 2015.
  2. ^ Helgason, Guðmundur. "WWI U-boat commanders: Johannes Spieß (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 13 March 2015.
  3. ^ a b c Gröner 1991, pp. 4–5.
  4. ^ "Sinking of HMS Aboukir, Cressy and Hogue by U-9". World War 1 Naval Combat. Retrieved 2007-05-27.
  5. ^ Farquharson-Roberts, Mike (2014). A History of the Royal Navy: World War I. I.B.Tauris. p. 8. ISBN 978-1-78076-838-0. Retrieved 2014-12-01.
  6. ^ Helgason, Guðmundur. "Ships hit by U 9". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 19 February 2014.
Other Languages
العربية: غواصة يو-9
Deutsch: SM U 9
norsk: SM U 9
polski: SM U-9
русский: U-9 (1910)