Horn, Mike.  "The American Flag Page - FAQ'S."   http://userpages.aug.com/haywire/faqs.html.
      
Hughes, Charles Evan.  "the Flag of the United States of America."   http://www.usflag.org/usflag.html.
      
Streufert, Duane.  "Evolution of the United States Flag."   http://www.usflag.org/flag.evolution.html.

"Colors of the Flag."   http://www.usflag.org/colors.html.
      
"Flag Timeline."  http://www.ushistory.org/betsy/flagfact.html.

"History Channel."   http://www.historychannel.com/cgi-bin/frameit.cgi?p=http%3A//www.historychannel.com/starspangled_archive/activities/authentic.html.

"The Legend of Betsy Ross."   http://www.usflag.org/about.betsy.ross.html.