Good Times Santa Cruz 1837 by Weeklys - Issuu
Accelerometers Could Finally Fix the NFL's Concussion Crisis
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NFL-Funded Lab Building a Safer Football Helmet
Detroit business Xenith wins $496,500 to help improve NFL helmet safety
US Army testing helmet tech that dramatically increases safety in military, sports - TechLink
Football helmet - Wikipedia
Affording the Latest in Football Equipment: A Car Raffle Is The Ticket!
NFL, NFLPA approve concussion-reducing helmet for quarterbacks
Shockbox Helmet Sensor Warns Of Possible Concussion
Winging It: Helmet History Reconsidered
Bike helmets: what the science really says about an American safety obsession.
Baltimore Ravens RB Ray Rice Announces Partnership With Xenith Football Helmets