Javed, T., Awan, F.A., Arshad, M., Mashiatullah, A., Iftikhar, F.J. and Khan, S.N. 2013. REMOVAL OF CADMIUM, COPPER, LEAD AND ZINC FROM SIMULATED INDUSTRIAL EFFLUENTS USING SILICA POWDER. The Nucleus. 50, 2 (May 2013), 135–140.