Other Football Leagues
Arena Football League-
The fifty-yard indoor war.
National Football League-
The one and only.
Canadian Football League-
Football North of the border.
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Football History Sites
The USFL Site-
The definitive site on the United States Football League.
Ballparks-
Information on USFL stadiums.
The Professional Football Researchers Association-
An extensive site with articles covering more than 100 years of pro football history.