WASET
Beheshti, A. , Salkhordeh, S. , Amini, H. (2009), 'Studying the Causes and Affecting Factors of Motorcycle Accidents A Case Study on the Road Accidents in Zanjan Province (IRAN) - 2007', World Academy of Science, Engineering and Technology, Open Science Index 30, International Journal of Humanities and Social Sciences, 3(6), 655 - 660.