Suprihanto Notodarmojo, Mahmud, and Amanda Larasati. “ADSORPTION OF NATURAL ORGANIC MATTER (NOM) IN PEAT WATER BY LOCAL INDONESIA TROPICAL CLAY SOILS”. GEOMATE Journal, vol. 13, no. 38, Apr. 2017, pp. 111-9, https://geomatejournal.com/geomate/article/view/1455.