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WikiPedia: USS_Kraken_(SS-370) http://perso.wanadoo.es/pfcurto/s_31.html http://navsource.org/archives/08/pdf/0829295.pdf http://www.navsource.org/archives/08/08370.htm https://www.history.navy.mil/research/histories/sh... https://uboat.net/allies/warships/ship/3108.html https://web.archive.org/web/20080315010313/http://... https://commons.wikimedia.org/wiki/Category:USS_Kr...