Yousufzai AHK, Hashmi DR. ?MEASUREMENT OF MAJOR AMBIENT AIR POLLUTION COMPONENTS AT SUB-URBAN AREA OF KARACHI. Pakistan Journal of Scientific & Industrial Research [Internet]. 1999 Aug. 23 [cited 2025 Jun. 8];42(4):161-9. Available from: http://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/2142