NFL history: 100 people who shaped the league, pro football
The Loop's Super Bowl LII Countdown: Worst teams – Twin Cities
University of Kentucky Football Media Guide, 1988
Montana, Rice and 49ers rule the 1980s
The Loop's Super Bowl LII Countdown: Worst teams – Twin Cities
San Francisco 49ers - Wikipedia
Trojans Look To End Losing Skid - USC Athletics
Trojans Open Season in Paradise - USC Athletics
What is the origin of the San Francisco 49ers team name? - Quora
NFL history: 100 people who shaped the league, pro football