What binds George Halas and Vince Lombardi, and Bears-Packers - Windy City Gridiron
Today in Pro Football History: 1968: George Halas Retires as Head Coach of Bears
Greatest Coaches in NFL History - George Halas - ESPN
George Halas, owner/coach of the Chicago Bears at work in his office, News Photo - Getty Images
On this day 50 years ago, George Halas retired as the Head Coach of the Chicago Bears. : r/CHIBears
Papa Bear: The Life and Legacy of George Halas: Davis, Jeff: 9780071477413: : Books
George Halas: Bears architect still going strong at 82 - Sports Illustrated Vault
Halas, Payton immortalized with statues
NFL: Each team's greatest head coach in franchise history