NFL Archives - KSL Sports
NFL Franchise Dates of Entry From 1920 to 2002
Chicago Bears - Wikipedia
Walter Lingo, Jim Thorpe, and the Oorang Indians: How a Dog Kennel Owner Created the NFL's Most Famous Traveling Team: Willis head of the Research Library at NFL Films and author of
American football - Simple English Wikipedia, the free encyclopedia
NFL Nostalgia: Ranking the Best Athletes in NFL History, News, Scores, Highlights, Stats, and Rumors
NFL Countdown: American Professional Football Association is formed
Super Bowl history: How the NFL's first champion was declared