Bears and Packers: To Call Them Rivals Is Understatement - The New York Times
Why do Packers fans hate the Bears? And vice versa? - Quora
Green Bay Packers - Chicago Bears Rivalry Since 1921 - Fox Valley Web Design LLC
Chicago Bears - Wikipedia
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Green Bay Packers - Wikipedia
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A Complete Guide to the Green Bay Packers-Chicago Bears Rivalry, News, Scores, Highlights, Stats, and Rumors
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Packers and Bears renew rivalry
Green Bay Packers - Wikipedia