YASMEEN, G., S. HAFEEZ, N. IKRAM, T.M. ANSARI, A. K. KHATTAK, & M. AFZAL. "Characterization of Metal Exchanged Zeolite-A using Quantasorb and Mercury Porosimeter." Pakistan Journal of Analytical & Environmental Chemistry [Online], 5.1 (2004): 9. Web. 20 Jan. 2021