George Halas PSA AutographFacts℠
John Happenny – Society for American Baseball Research
The Story of “Papa Bear” George Halas - University of Illinois Athletics
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
An inside look at chairman George McCaskey's passion for Bears jerseys - The Athletic
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
George Halas was a pro basketball pioneer as well
NFL star George Halas was once a Yankee
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
Chicago Bears: First takes on 17 coaches
George Halas, NFL coach, Chicago Bears, Pro Football Hall of Fame
Happy Birthday George Halas