History of the NFL from the year you were born
Thorp Sporting Goods Football – Circa 1960's – Rozelle – w Stripes - Finding Nostalgia
Thorp Sporting Goods NFL Vintage Football – Bell – White Leather – Early 1950's - Finding Nostalgia
Ball Said to be from 1958 NFL Championship at Huggins and Scott Auctions - Sports Collectors Digest
The NFL: 100 Years of football - Los Angeles Times
NFL History: 100 objects that tell the story of football - Sports Illustrated
Thorp Sporting Goods – Wilson NFL Vintage Football – Bell – Comm – White Stripes - Finding Nostalgia
2017 Air Force football media guide by Dave Toller - Issuu
PFRA PROFESSIONAL FOOTBALL RESEARCHERS ASSOCIATION