NFL History: 100 objects that tell the story of football - Sports Illustrated
NFL All-Time Team: George Halas
NFL ban on Black players lingers, Columnists
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
New York Giants History - Page 2 of 3 - Big Blue Interactive
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
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
Throwback: The truth about George Halas and the NFL's ban on black players - Windy City Gridiron