Třída U 117 (Czech Wikipedia)

Analysis of information sources in references of the Wikipedia article "Třída U 117" in Czech language version.

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archive.org

GARDINER, Robert. Conway's All the World's Fighting Ships, 1906–1921. London: Conway Maritime Press, 1985. Dostupné online. ISBN 978-0-85177-245-5. S. 178. (anglicky)

U117 submarine cruisers - minelayers (1918) [online]. Navypedia.org [cit. 2021-04-12]. Dostupné online. (anglicky)
RENÉ AUDRY minelaying submarine (1918 / 1918) [online]. Navypedia.org [cit. 2021-04-12]. Dostupné online. (anglicky)
"U117" ex-German submarine (O1) (1918 / 1919) [online]. Navypedia.org [cit. 2021-04-12]. Dostupné online. (anglicky)