HARMI TJAHJANTI, P. and Ernanda, R. R. (2024) “Silica Sand, Activated Carbon, and Manganese Zeolite for Clean Water Filtration”, Indonesian Journal of Cultural and Community Development, 15(3), p. 10.21070/ijccd.v15i3.1064. doi: 10.21070/ijccd.v15i3.1064.