A Comparison Study of the Metal Oxide Catalysts for the Conversion of Used Cooking Oil into High Grade Chemicals (Wali Ullah, Naseer Ahmed Khan, Naveed ul Hasan Syed, & Muddasar Habib, Trans.). (2021). Pakistan Journal of Analytical & Environmental Chemistry, 22(1), 150-158. https://doi.org/10.21743/pjaec/2021.06.15