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Naval Vessel Registrar
http://www.nvr.navy.mil/nvrships/details/SSN667.htm
SSN-667 fact sheet.
NavSource Online
http://www.navsource.org/archives/08/08667.htm
Bergall (SSN-667) facts and images.
SubNet
http://www.subnet.com/FLEET/ssn667.htm
USS Bergall specifications and history.
USS Bergall (SS-320/SSN-667) Association
http://www.simplyweb.net/aft/bergall2.html
Specifications, history, images, sea stories, memorials, and reunion information.