I. Rosenta, I. . Lihardo Hulu, A. . Harahap, K. . Maini Hasibuan, P. Nwazonobi, and F. . Mustika Piliang, “Analysis of the Quality of the River Kualuh in the Review of the Physical-Chemical”, IJSTM, vol. 5, no. 4, pp. 784–788, Jul. 2024.