Abd Aziz, N.I. (2019) “Optimization of pH and Contact Time of Media in Removing Calcium and Magnesium from Groundwater”, International Journal of Integrated Engineering, 11(9), pp. 063–072. Available at: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/5429 (Accessed: 20 May 2024).