Rania, F., Khati, I. H., Mahmood, F., & lqbal, M. Z. (1998). ?STUDIES ON THE LEACHING OF COPPER FROM COMPLEX COPPER ORES OF CHITRAL. Biological Sciences - PJSIR, 41(3), 140–144. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/2255