Nasution AFR, Wijayanto FN, Mubarok Z, Bagus MI, Matondang MR. The Spatial Analysis of Water Quality in Batang Natal River Estuary Area, Mandailing Natal Regency, North Sumatra. PROBILITAS [Internet]. 2022 Jun. 26 [cited 2025 Nov. 18];1(02). Available from: https://journals.insparagonsociety.org/index.php/probilitas/article/view/177