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Haze Gray and Underway
http://www.hazegray.org/danfs/submar/ssn660.txt
SSN-660 ship's history from the Dictionary of American Naval Fighting Ships.
Naval Vessel Registrar
http://www.nvr.navy.mil/nvrships/details/SSN660.htm
SSN-660 fact sheet.
NavSource Online
http://www.navsource.org/archives/08/08660.htm
Sand Lance (SSN-660) facts and images.
Subnet
http://www.subnet.com/fleet/ssn660.htm
Sand Lance photo and brief history.