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Naval Vessel Registrar
http://www.nvr.navy.mil/nvrships/details/SSN665.htm
SSN-665 fact sheet.
NavSource Online
http://www.navsource.org/archives/08/08665.htm
USS Guitarro specifications.
Subnet
http://www.subnet.com/fleet/ssn665.htm
SSN-665 photos and basic facts.
Vacaville Reporter
http://63.192.157.117/history/history040101.html
Article "May day tragedy haunted Mare Island: Guitarro's sinking a stunner" by Jerry Bowen.