Chaudhry, M Rafique, and M Yusuf. “?ACTIVATION OF D.G. KHAN FULLER’S EARTH WITH HYDROCHLORIC ACID”. Biological Sciences - PJSIR 41, no. 3 (June 22, 1998): 132–135. Accessed July 3, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/2253.