ABD AZIZ, Nor Izzah. Optimization of pH and Contact Time of Media in Removing Calcium and Magnesium from Groundwater. International Journal of Integrated Engineering, [S. l.], v. 11, n. 9, p. 063–072, 2019. Disponível em: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/5429.. Acesso em: 20 may. 2024.