Coenraad, R., Wiratno, & Karelius, K. (2020). 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(2), 70–76. https://doi.org/10.36873/jjms.v1i2.213