“Water Quality of Unconfined Aquifer in Universitas Negeri Malang Following the Drinking Water Quality Standard of Indonesian Ministry of Health”. Tunas Geografi 13, no. 1 (July 31, 2024): 71–82. Accessed March 28, 2026. https://jurnal.unimed.ac.id/2012/index.php/tgeo/article/view/53219.