Kartika Sari, E. and Lucyana, L. (2020) “Economic Valuation of Water Quality Condition Ogan River against the Clean Water in the District of Ogan Komering Ulu”, Jurnal Lahan Suboptimal : Journal of Suboptimal Lands, 9(2), pp. 139–148. doi: 10.33230/JLSO.9.2.2020.504.