Javed, T., F. A. Awan, M. Arshad, A. Mashiatullah, F. J. Iftikhar, and S. N. Khan. “REMOVAL OF CADMIUM, COPPER, LEAD AND ZINC FROM SIMULATED INDUSTRIAL EFFLUENTS USING SILICA POWDER”. The Nucleus 50, no. 2 (May 21, 2013): 135–140. Accessed December 10, 2024. http://thenucleuspak.org.pk/index.php/Nucleus/article/view/763.