The Official Site of the Tennessee Titans
Leatherhead to Radio-head: The Evolution of the Football Helmet, Arts & Culture
The first-ever NFL helmet with a logo was hand-painted by the Rams' Fred Gehrke in 1947 - ABC7 Los Angeles
The History of the Football Helmet - Brain Injury Law Center
The Wearing Of the Green (and Gold): Evolution of the NFL Football Helmet
Classic Helmet Designs for Each NFL Team, News, Scores, Highlights, Stats, and Rumors
Florida Football: Gators helmet designs through years since pre-1946
Check Out the Football Helmets Of Yesteryear
Hall of Honor Features AFL Helmet History
The Football Helmet. Personal Selection, by Brandon Martin