Perdanie, Esa Putri, Rahmadani Rahmadani, Husda Oktaviannoor, and Tuti Alawiyah. “Pemanfaatan Arang Aktif Tongkol Jagung (Zea Mays) Dalam Menurunkan Kesadahan Pad Air Sumur Di Kabupaten Katingan: Ultilization of Corn COB Activated Charcoal (Zea Mays) in Reducing the Hardness of Well Water in Katingan Regency”. Jurnal Surya Medika (JSM) 10, no. 3 (December 15, 2024): 88–94. Accessed April 2, 2025. https://ojs.umpr.ac.id/jsm/article/view/8969.