George Halas a rival on the field, helper off the field
A Complete Guide to the Green Bay Packers-Chicago Bears Rivalry, News, Scores, Highlights, Stats, and Rumors
Bears-Packers: 'Cheddar Curtain' Rivals For The Ages : NPR
Cardinals stake claim: NFL's oldest franchise has a story to tell
Old rivals go for NFC crown, Local Sports
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
After piggybacking on baseball, NFL stood tall in expansion
Chicago Tribune: Chicago coach Halas helped keep the Packers in Green Bay
What binds George Halas and Vince Lombardi, and Bears-Packers - Windy City Gridiron