Jock, Alexander Asanja, Asabe Mercy Magomya, and Saviour Etim Essang. “RECYCLING AND CHARACTERIZATION OF SPENT ENGINE OIL USING TWO STAGES: SOLVENT EXTRACTION AND CLAY PERCOLATION TECHNIQUES”. FUDMA Journal of Sciences 7, no. 3 (June 30, 2023): 182–185. Accessed August 21, 2026. https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1836.