NFL History: 100 objects that tell the story of football - Sports Illustrated
Do-it-all Caires does it all for future generations
The NFL Unmasked: Concussions and the Lost Art of Tackling - Fire Engineering: Firefighter Training and Fire Service News, Rescue
DeMarcus Ware refused to look at stories about him during his career. But his former teammates have plenty to tell. – The Denver Post
Wild facemasks of the NFL
Football helmet - Wikipedia
Face mask (gridiron football) - Wikipedia
An Ode to the Vertical Bar Facemask, by Ben D'Alessio
Art keeps former Griz Ellig close to the game
Face masks were still a novelty in 1953 - Vintage Detroit Collection