Bibliography HOME All of my references Committee on Review of Test Protocols Used by the DoD to Test CombatHelmets. "Evolution of Combat Helmets Based - Review of Department of Defense Test Protocols for Combat Helmets - NCBI Bookshelf." National Center for Biotechnology Information. U.S. National Library of Medicine, 31 Mar. 2014. Web. 20 Nov. 2016.  (BOOK SOURCE) "Helmet." Wikipedia. Wikimedia Foundation, n.d. Web. 19 Nov. 2016. "The History of Motorcycle Helmets." The History of Motorcycle Helmets - Eagle Leather Motorcycle Gear and Accessories, Gear for the Ride.N.p., n.d. Web. 22 Nov. 2016. "How Does a Bicycle Helmet Protect Your Head?" Explain That Stuff. N.p., 23 Sept. 2016. Web. 22 Nov. 2016. "Extreme Team Sports." History Of Football Helmets. N.p., n.d. Web. 22 Nov. 2016. "Helmets: How They Work and What Standards Do." Helmets: How They Work and What Standards Do. N.p., n.d. Web. 22 Nov. 2016.