100 Things Bears Fans Should Know & Do Before They Die (100 ThingsFans Should Know): McDill, Kent, Joniak, Jeff: 9781600784125: : Books
Pro Football Journal: Chicago Bears All Career-Year Team
NFL history: 100 people who shaped the league, pro football - Sports Illustrated
Dick Butkus, Chicago Bears legend and Hall of Famer, dies at 80 - The Athletic
Dick Butkus, Chicago Bears' Fearsome Hall of Fame Linebacker, Dies at 80 - The New York Times
Chicago Bears: Top 20 First-Round Picks in Team History, News, Scores, Highlights, Stats, and Rumors
Pro Football Journal: The NFL's Top Pre-WWII Ends
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
Pro Football Journal: Chicago Bears All Career-Year Team
How George Halas' columns for the Chicago Tribune, a field goal and a charity game helped the Chicago Bears prove their legitimacy in 1935
Ranking the 100 best Bears players ever: No. 11, Mike Ditka
News Chicago Bears Official Website