Super Bowl history: How the NFL's first champion was declared
The NFL's First Game Was Played in Dayton
History of the NFL - National Football League
Remembering pro football's Ralph Hay
National Football League (NFL), History, Teams, & Facts
The Rich History of the NFL Betting in the State of Ohio - Scioto Post
If We're Talking Founding Fathers, Let's Talk Ralph Hay - Talk Of Fame
There was a time NFL outgrew Canton; not anymore
NFL founded in Canton on Sept. 17, 1920
As Packers legend LeRoy Butler awaits induction, Canton and Green Bay share a common link in football history - Acme Packing Company