Hashmi, D. R. and Khani, M. I. Q. (2003) “?ENVIRONMENTAL IMPACT ASSESSMENT OF AIR POLLUTION IN DIFFERENT AREAS OF KARACHI”, Biological Sciences - PJSIR, 46(6), pp. 399–405. Available at: https://v2.pjsir.org/index.php/biological-sciences/article/view/1682 (Accessed: 17 May 2024).