Hernandi, M. Fikri, Rasyid Zarta, Wartomo, and Erna Rosita. “Kualitas Lingkungan Air Sungai Sekitar Kegiatan Pertambangan Batubara”. Buletin Poltanesa 22, no. 1 (June 2, 2021): 19–24. Accessed May 19, 2024. https://e-journal.politanisamarinda.ac.id/index.php/tanesa/article/view/460.