KURNIAWAN, Z.; AGUSTINA, N. A. .; PRATOMO, B. Analysis of Sungai Ular Water Quality Viewed from The Impact of Palm Oil Industry Activities And PDAM. Jurnal Online Pertanian Tropik, [S. l.], v. 7, n. 3, p. 326–334, 2021. DOI: 10.32734/jopt.v7i3.5481. Disponível em: https://talenta.usu.ac.id/jpt/article/view/5481. Acesso em: 12 aug. 2025.