“Characterization of Thin Alluvial Bed Aquifers in Manggar River Balikpapan East Kalimantan Indonesia”. JTT (Jurnal Teknologi Terpadu) 5, no. 1 (April 11, 2017): 54–62. Accessed June 16, 2026. https://jurnal.poltekba.ac.id/index.php/jtt/article/view/212.