http://en.wikipedia.org/wiki/B-17_Flying_Fortress

http://www.b17.org/

http://b-17.com/

http://libertyfoundation.org/

http://www.warbirdalley.com/b17.htm

http://northstargallery.com/Aircraft/B17/about.htm

http://www.collingsfoundation.org/tour_b-17g.htm

http://www.b17.us/

http://www.acepilots.com/planes/b17.html

http://en.wikipedia.org/wiki/B-17_Flying_Fortress_variants

http://www.b17.org/history/history.asp

http://www.thefind.com/family/info-b~17-flying-fortress