Mujahida, Abdurrahman, and Sitti Aminah. “Determination of Iron (Fe) and Hardness (CaCO3) Levels in Water Sources in Besusu Tengah Village, East Palu District”. Media Eksakta 18, no. 1 (May 31, 2022): 31-36. Accessed April 3, 2025. https://jurnalfkipuntad.com/index.php/jme/article/view/1026.