Slideshow: NFL Logo Evolution, #1 Selling Logo Software for over 18 years
NFL chain gangs: Everything you need to know about the crews who man the down markers - Sports Illustrated
NFL Logo and the History of the League
National Football League - Wikipedia
Super Bowl Champions (2023): San Francisco 49ers – The Creative Company Shop
Big 12 Conference Announces 2023 Big 12 Homecoming Activations, Performers and Notable Speakers - Big 12 Conference
Super Bowl, History, Appearances, Results, & Facts
NFL Team Logos history and evolution
Alex Smith's miraculous comeback, and why he opted for retirement - Sports Illustrated
Favorite obscure NFL-related memorabilia - Professional Football Researchers Association Forum
NFL Alters Gambling Policy, Increasing Punishments for Betting on Games