NFL star George Halas was once a Yankee
Local artist keeps Bears' team photo tradition alive during pandemic - ESPN - Chicago Bears Blog- ESPN
NFL's 1st decade was the 1920s, when teams came and went
Chicago Bears Reportedly on the Market – The Sport Digest
Throwback Thursday: George Halas and the Bears officially form the NFL
George Halas — Father of the NFL - Big Blue View
Bob Macleod 1939 Chicago Bears 2X Signed Swell George Halas Card
George Halas Pro Football Hall of Fame
Muncie was in at NFL's ground floor