Hall of Fame-laden Chiefs of 50 years ago won only one title. Why? - ESPN - Kansas City Chiefs Blog- ESPN
Kansas City Chiefs - Seasons
Len Dawson, Who Took Kansas City to a Championship, Dies at 87 - The New York Times
Chiefs Defeat 49ers in Stunning Super Bowl Comeback - The New York Times
Clemson football fans know the exact pain the Kansas City Chiefs feel
Mahomes could make more history when Chiefs square off against J - KAKE
Kansas City Chiefs Super Bowl History
1969 Kansas City Chiefs – Missouri Sports Hall of Fame
Kansas City Chiefs, American Football Wiki