BASRANSYAH, Basransyah; RINA NOOR HAYATI; MELISA TRIANDINI MAULANI; DEFRIATNO, Mawan Eko. Determination of the Water Quality Status of the Upper Somber River Using the Pollution Index Method. SPECTA Journal of Technology, [S. l.], v. 10, n. 1, p. 54–62, 2026. Disponível em: https://journal.itk.ac.id/index.php/sjt/article/view/8481934. Acesso em: 2 may. 2026.