Kartika Sari E, Lucyana L. Economic Valuation of Water Quality Condition Ogan River against the Clean Water in the District of Ogan Komering Ulu. J. Lahan Suboptimal [Internet]. 2020Oct.1 [cited 2024Nov.23];9(2):139-48. Available from: https://jlsuboptimal.unsri.ac.id/index.php/jlso/article/view/504