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Concussions and the marketing of sports equipment hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, first session, October 19, 2011
- "Concussions and the marketing of sports equipment hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, first session, October 19, 2011"@en
- "Concussions and the marketing of sports equipment : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, first session, October 19, 2011"@en