Dick Butkus, Chicago Bears icon, dies at 80 - CBS Chicago
Grave Story: George Halas (1895-1983) – RIP Baseball
George Halas — Father of the NFL - Big Blue View
The Sternaman brothers (football pioneers)
Illinois Alumni Magazine - Fall 2017 - PAPA BEAR
George Halas Cards Trading Card Database
George Halas PSA AutographFacts℠
George S. Halas, The Grainger College of Engineering
Indoor Baseball in Chicago High Schools, 1892 to 1919; Essay by Robert Pruter
Guest Blog City of Baseball Museum
Forgotten story of four who broke color barrier in pro football to screen at Royce
Our part in the Chicago Bears' 100 years of American football
Then Roy Said to Mickey. . .
Playoffs! - Complete History of Pro Football's Playoffs by Steve Fulton - Ebook
Pro football gave Packers the boot