Behnam Rahimi,Abolfazl Semnani, Alireza Nezamzade Ejhieh , Hamid Shakoori Langeroodi, Mas, Dr.. " Application Of Icp-Oes In The Comparative Analysis Of A Used And Fresh Gasoline Motor Oil" Global Journal of Science Frontier Research [Online], Volume 12 Number 2-B (29 February 2012)