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George Halas, right, owner and former coach of the Chicago Bears
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Today in Pro Football History: 1968: George Halas Retires as Head
GEORGE HALAS, FOOTBALL PIONEER, DIES - The New York Times
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Dick Butkus, fearsome Hall of Fame Chicago Bears linebacker, dies
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Dooley Jr. recalls his father's memorable run as Bears coach
George Halas, right, owner and former coach of the Chicago Bears
What binds George Halas and Vince Lombardi, and Bears-Packers