Rahman A, Salman M, Hammed K. Catalytic Cracking of Iraqi Vacuum Gasoil Using Large and Medium Pore Size of Zeolite Catalysts. en [Internet]. 31Dec.2014 [cited 29Nov.2019];11(1):73-. Available from: http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/216