What Year Did Each NFL Team Join The League?
The NFL: 100 Years of football - Los Angeles Times
History of the Decatur Staleys / Chicago Bears – Staley Museum
Fritz Pollard: An African American founding father of the NFL
The 10 Biggest Changes in 100 Years of the NFL - Last Word on Sports
The History Of How Football Became America's Favorite Game
10 Oldest Teams in the NFL
NFL's 1st decade was the 1920s, when teams came and went
Muncie was in at NFL's ground floor
Why It Took So Long for Two Black QBs to Face Off in the Super
The NFL's First Game Was Played in Dayton