Bears' failure with Butkus and Sayers was unforgiveable
100 greatest moments in Chicago Bears history
SPORTS PEOPLE: PRO FOOTBALL; Bears Retire Numbers - The New York Times
5-at-10: Weekend winners and losers, NFL draft stars, Rushmore of Godfather lines
Bears draft Gale Sayers and Dick Butkus
NFL Wild-Cards: The Eagles, Chargers, Cowboys and Colts Advance—and Look Dangerous - Sports Illustrated
Bears chose Butkus, Sayers back-to-back in '65
Dick Butkus: Bears firings bucked thrifty trend - Chicago - Chicago Sun-Times
Butkus, fearsome Hall of Fame linebacker for the Bears, dies at 80, NFL
Bears chose Butkus, Sayers back-to-back in '65