“?ACTIVATION OF FULLER’S EARTH OF D.G. KHAN WITH SULPHURIC ACID”, Pakistan Journal of Scientific & Industrial Research, vol. 39, no. 9-12, pp. 171–174, Dec. 1996, Accessed: Mar. 10, 2026. [Online]. Available: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2402