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Haze Gray and Underway
http://www.hazegray.org/danfs/submar/ssbn645.htm
Ship's history from the Dictionary of American Naval Fighting Ships.
Naval Vessel Registrar
http://www.nvr.navy.mil/nvrships/details/SSN645.htm
Brief James K. Polk (SSN 645, ex-SSBN 645) fact sheet.
NavSource Online
http://www.navsource.org/archives/08/08645.htm
SSBN/SSN-645 history, specifications, and images.
St. Mary's Submarine Museum
http://www.stmaryssubmuseum.com/polk.html
Description of the Polk display.
USS James K. Polk Alumni Association
http://www.ssbn645.com/
Memorials, photos, ship's history, and reunion information.