Khan IH, Mahmood F, Zahra S, Saleem F, Naeem M. STUDIES ON THE UTILIZATION OF SPENT CATALYST USED IN OIL REFINERY. Pakistan Journal of Scientific & Industrial Research [Internet]. 2004 Aug. 30 [cited 2025 Jul. 29];47(4):265-7. Available from: https://biostaging.pjsir.org/index.php/biological-sciences/article/view/1532