FAS: KC-135R Stratotanker - A comprehensive resource with statistical information, aircraft specifications, and a small image gallery. www.fas.org/nuke/guide/usa/bomber/kc-135r.htm
USAF KC-135 Stratotanker - Official USAF factsheet. www.af.mil/news/factsheets/KC_135_Stratotanker.html
Boeing KC-135 Stratotanker - An official Boeing web site that includes news releases, photos, and specifications. www.boeing.com/defense-space/military/kc135-strat
