Information gathered for this site can be found on the above links and the books mentioned below. For more information regarding the history of the NFL and uniforms plese read:
NFL Properties. The NFL's Official Encyclopedic History of Professional Football
1977. Macmillan Publishers.
Maule, Hamilton. The Game: The Official Picture History of the NFL and AFL.
1967. Random House Publishing.
McDonough, William. The NFL Century: The Complete Story of the National Football League, 1920-2000
1999. Smithmark Publishers.
Brock, Ted and Eldridge, Larry. 25 Years the NFL Since 1960
1985. Smith & Schuster.