Haesti Sembiring. 2023. “The Effectiveness of Zeolite-Activated Charcoal in Reducing Iron and Manganese Levels in Well Water of Milala Housing in Pancur Batu District, North Sumatra”. Jurnal Multidisiplin Madani 3 (9):1838-43. https://doi.org/10.55927/mudima.v3i9.5993.