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Naval Vessel Register
http://www.nvr.navy.mil/nvrships/details/SSN677.htm
SSN 677 fact sheet.
NavSource Online
http://www.navsource.org/archives/08/08677.htm
Drum specifications and photos.
USS Drum (SSN-677)
http://www.geocities.com/ussdrum/
A collection of information, pictures and visual memorabilia on the US nuclear attack submarine, USS Drum.