George Halas Played Dirty And It Cost Him Once Against a Chippewa Native
Duke Slater, NFL's 1st Black lineman, is now Hall of Famer
The NFL's Humble Beginnings
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
NFL's Depression-Era Ban on Black Players Lingers On in the Owners Box
How George Halas' columns for the Chicago Tribune, a field goal and a charity game helped the Chicago Bears prove their legitimacy in 1935
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
George Halas named NFL's fourth best coach of all time
Throwback: The truth about George Halas and the NFL's ban on black players - Windy City Gridiron
A Close Look at a 1965 NFL Uniform Article
Steelers Triviology: Fascinating Facts from the Sidelines: Walsh, Christopher: 9781600786211: : Books
George Halas – Society for American Baseball Research
Throwback: The truth about George Halas and the NFL's ban on black players - Windy City Gridiron
WCG's Jack Silverstein Brings History Into Focus - Windy City Gridiron