The NFL: 100 Years of football - Los Angeles Times
Who are the most popular NFL teams? Cowboys lead US in search hits
History of the National Football League - Wikipedia
History of the National Football League - Wikipedia
NFL Resurrected: Frankford Yellowjackets Philadelphia's original
NFL, StatusPro Virtual Reality Game Pro Era Launches
Beyond Lot J, it's worth asking: What is an NFL team worth to a city?
How TV and Roy Rogers Helped Put Logos on NFL Team Helmets — Todd