A short, heads-up history of the Hockey helmet - Vintage Detroit Collection
NHL fighters will be penalized for removing helmets before brawl; pass or fail? - Yahoo Sports
:format(jpeg)/cdn.vox-cdn.com/uploads/chorus_image/image/20082597/20130923_kdl_ad7_005.0.jpg "NHL rule changes: Has the helmet loophole been closed? - SBNation.com")
NHL rule changes: Has the helmet loophole been closed? - SBNation.com
Connor Bedard to receive hefty fine; broke a league rule in his first-ever NHL game
When Did the NHL Require Helmets? We Explain The Hockey Helmet Rule
Blackhawks' Bedard Breaks Rule, Goes Bucketless
The Last Players Not to Wear Visors in the NHL - The Hockey News
NHL will require helmets for warmups
USAH Coaches & Volunteers Helmet Rule - OREGON STATE HOCKEY ASSOCIATION
Hockey helmet - Wikipedia
Hockey helmet - Wikipedia
7 Players Who FORCED NHL Rule Changes - YouTube
Bucket List: When and Why? | Carolina Hurricanes
Quirk in the N.H.L. Visor Debate: Fighters Get Penalized - The New York Times
What is the NHL's rule when a player's helmet comes off? Is the rule too ambiguous?
When Did the NHL Require Helmets? We Explain The Hockey Helmet Rule
Expanded Rule 48 may cause more confusion - Sports Illustrated
Did ice hockey players actually not wear helmets until the 1970s-1980s? - Quora
NHL tough guys ponder implications of visors for fisticuffs
Connor Bedard to receive hefty fine; broke a league rule in his first-ever NHL game
Helmet holdouts: The last players not to wear helmets in the NHL - The Hockey News
NHL: Obscure Rule Lets Paul Deutsch Go Pro for 24 Hours - WSJ
