Hendrayana, Heru, Doni Prakasa Eka Putra, and Yosua Priambodo. “Assessment of Organic Carbon Contamination in the Unsaturated Zone: A Case of Yogyakarta City, Indonesia”. Journal of Degraded and Mining Lands Management 9, no. 1 (October 1, 2021): 3115–3127. Accessed July 18, 2024. https://jdmlm.ub.ac.id/index.php/jdmlm/article/view/947.