Murakami, S.McLean, JackNakamura, N.Tani, S.Takekawa, M.Abe, T.2009-01-162009-01-161997http://hdl.handle.net/2440/48804Helmet usage; MotorcyclistEffectiveness of safety helmets on motorcyclists: an analysis of 158 fatally injured cases in South Australia (in Japanese)Conference paper20090115101329