Reference

http://www.hfmgv.org/exhibits/wright/

http://history1900s.about.com/gi/dynamic/offsite.htm?site=http%3A%2F%2Fhawaii.psychology.msstate.edu%2Finvent%2Fi%2FWrights%2FW_Portraits.html

http://history1900s.about.com/gi/dynamic/offsite.htm?site=http%3A%2F%2Fwww.fi.edu%2Fflights%2Ffirst%2Fintro.html