K. Al-Dawery S, A-A. Khammas Z, Adnan Abdulla T. Purification of Zinc Oxide Using Direct Thermal Process by Petroleum Coke. IJCPE [Internet]. 2009 Mar. 30 [cited 2024 Nov. 22];10(1):35-41. Available from: https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/396