Vahid Nikbin Assistant professor پست الکترونيکی nikbin@znu.ac.ir آدرس اینترنتی http://www.znu.ac.ir/members/vnikbin تلفن +98 (0) 24 3305 4362 Address Department oF Mining Engineering, Faculty of Engineering, University of Zanjan, P.O.Box 313, Zanjan, IRAN