From the NFL Archives: The Best of the AFL 1960-1969
American Football League, American Football Wiki
History of the AFL 1960-69, 1967 season
347 Len Dawson Chiefs Stock Photos, High-Res Pictures, and Images - Getty Images
Pro Football Journal: Reviewing SI/Talk of Fame Candidates for the AFL-HOF Excercise
History of the AFL 1960-69, 1967 season
NFL 100: Ranking the top pro football players from HBCU programs
History of the AFL 1960-69, 1969 championship
Latest pro football league, AAF, doomed to failure