Huvat, A. G. ., R. . Kartika, M. . Mustakim, and Y. . Ilang. “Water Quality Study and Water Quality Status Using Storet and Index Method Pollutants in Ratah River Mahakam Ulu Regency, East Kalimantan”. Edelweiss Applied Science and Technology, vol. 9, no. 6, June 2025, pp. 2442-59, doi:10.55214/25768484.v9i6.8408.