Shaikh, S. A., Gul, N. and Sultana, L. (2008) “Surveillance of Drinking Water of Karachi City: Microbiological Quality”, Biological Sciences - PJSIR, 51(5), pp. 272–275. Available at: https://v2.pjsir.org/index.php/biological-sciences/article/view/695 (Accessed: 6 May 2024).