The Catalytic Activity of Modified Zeolite Lanthanum on the Catalytic Cracking of Al-Duara Atmospheric Distillation Residue. jcoeng [Internet]. 2016 Mar. 1 [cited 2025 Jul. 4];22(3):36-48. Available from: https://www.joe.uobaghdad.edu.iq/index.php/main/article/view/243