Toalu, Apdiyani, Muh. Risal Tawil, Musfirah Musfirah, Mauritz Pandapotan Marpaung, Rahmat Pannyiwi, and Halimatussa’diah Halimatussa’diah. 2023. “Content of E.Coli, Coliform and Iron (Fe) Bacteria With A Refill Drinking Water Treatment System in Tinggimoncong District”. International Journal of Health Sciences 1 (2):196-202. https://doi.org/10.59585/ijhs.v1i2.84.