NFL's Depression-era ban on black players lingers on in the owner's box - Chicago Sun-Times
How George Halas' columns for the Chicago Tribune, a field goal and a charity game helped the Chicago Bears prove their legitimacy in 1935
History of the NFL Draft Part 2 - The NFL Draft
American Sports [4 volumes]: A History of Icons, Idols, and Ideas [4 volumes]: Murry R. Nelson: Greenwood
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
A REMEMBRANCE OF GEORGE HALAS & THE ROLE HE PLAYED IN THE SUCCESS OF THE NFL
This Week in NFL History (May 23-May 29): 'Papa Bear' George Halas retires as all-time winningest coach
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
George Halas a real pro in fostering NFL-media relationship
Throwback: The truth about George Halas and the NFL's ban on black players - Windy City Gridiron
A REMEMBRANCE OF GEORGE HALAS & THE ROLE HE PLAYED IN THE SUCCESS OF THE NFL
Rookie Cards of the First Black Players in Modern NFL History
George Halas PSA AutographFacts℠
Duke Slater, NFL's 1st Black lineman, is now Hall of Famer