1.
THE VARIATION OF CALCIUM, MAGNESIUM, SODIUM, POTASSIUM AND BICARBO­ NATE CONCENTRATION, pH AND CONDUCTIVITY IN GROUNDWATER OF KARACHI REGION. Pakistan Journal of Scientific & Industrial Research. 2002;45(3):151-156. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1775