The History of the NFL: The Evolution of the Game (The History of
Throwback uniform - Wikipedia
Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA
The Best (and Worst) Uniforms in Steelers History - Sports
Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA
Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA
Eyes of the Guru IDP Info, Part 11: Pittsburgh Steelers - Footballguys
Pittsburgh Steelers Throwback Uniforms: Grading the Outlandish
Evolution of the NFL Player
New England Patriots - Wikipedia