Coenraad, Revianti, Wiratno, and Karelius Karelius. “Perancangan Filter Penjernih Air Sungai Kahayan Berbasis Pasir Silika Dan Lempung Alam Asal Kalimantan Tengah: Design of Kahayan River Water Treatment Filter Based Silica Sand and Natural Clay of Central Kalimantan”. Jurnal Jejaring Matematika dan Sains 1, no. 2 (May 11, 2020): 70–76. Accessed November 24, 2024. https://e-journal.upr.ac.id/index.php/JMS/article/view/543.