Shaikh, Shagufta Ambreen, Nadia Gul, and Liaquat Sultana. “Surveillance of Drinking Water of Karachi City: Microbiological Quality”. Biological Sciences - PJSIR 51, no. 5 (September 25, 2008): 272–275. Accessed November 24, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/695.