Darman, Herman, and Deddy Hadriyanto. “Mahakam River Drainage Basin: The Sediments Source of the Mahakam Delta”. Berita Sedimentologi 5, no. 1 (August 7, 2021): 6–7. Accessed October 30, 2026. https://journal.iagi.or.id/index.php/FOSI/article/view/301.