Today in Pro Football History: 1968: George Halas Retires as Head Coach of Bears
Cleveland Browns: Former HC Romeo Crennel retires - Dawgs By Nature
George Halas retired as Bears coach 50 years ago today - NBC Sports
Chicago Bears founder George Halas played a part in everything for NFL - Chicago Sun-Times
Bears President Ted Phillips to retire at end of season
On this date: George Halas retires an an NFL head coach. - ESPN - Stats & Info- ESPN
The birth of the Pro Football Hall of Fame — 50 years ago
Crennel retires after almost 40 years as NFL coach
Romeo Crennel retires after almost 40 years as NFL coach
Happy Birthday George Halas