Throwback: The truth about George Halas and the NFL's ban on black players - Windy City Gridiron
The FUNNIEST PLAYOFF SCENARIO in NFL HISTORY
The Life And Career Of NFL Pioneer Fritz Pollard (Complete Story)
NFL history: 100 people who shaped the league, pro football - Sports Illustrated
The Chicago Bears' Top 5 running backs in franchise history
New York Giants History - Big Blue Interactive
NFL's Depression-era ban on Black players lingers on in the owner's box - The Philadelphia Sunday Sun
Chicago Bears – ReadJack.com
George Halas came 50 minutes from losing the Bears in 1933 — until soon-to-be Cardinals owner Charles Bidwill bailed him out - Windy City Gridiron
NFL history: 100 people who shaped the league, pro football - Sports Illustrated
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
NFL History: 100 objects that tell the story of football - Sports Illustrated