“?EVALUATION OF SHALLOW GROUNDWATER QUALITY IN URBA~ AREAS OF KARACHI (PAKISTAN)-INORGANIC NUTRIENTS AND BACTERIAL CONTAMINATION”, Pakistan Journal of Scientific & Industrial Research, vol. 43, no. 4, pp. 221–225, Jun. 2000, Accessed: Mar. 22, 2026. [Online]. Available: https://biostaging.pjsir.org/index.php/biological-sciences/article/view/2036