21 cm SK L/45 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "21 cm SK L/45" in English language version.

refsWebsite

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navweaps.com

DiGiulian, Tony. "Germany 21 cm/45 (8.27") SK L/45 - NavWeaps". www.navweaps.com. Retrieved 2017-03-07.
DiGiulian, Tony. "Germany 21 cm/45 (8.27") SK L/45 - NavWeaps". www.navweaps.com. Retrieved 2017-03-07.

worldcat.org

search.worldcat.org

Gröner, Erich (1990). German warships, 1815-1945. Naval Institute Press. ISBN 9780870217906. OCLC 434152478.
Friedman, Norman (2011-01-01). Naval weapons of World War One. Seaforth. ISBN 9781848321007. OCLC 786178793.