Leidonald, R., Muhtadi, A., Ashshiddiq, M. A. ., Siahaan, V. S., & Manurung, B. U. . (2025). Water Quality Degradation in the Deli River Watershed, North Sumatra: Impacts of Land Use and Pollution Sources. Jurnal Pengelolaan Sumberdaya Alam Dan Lingkungan (Journal of Natural Resources and Environmental Management), 15(4), 669. https://doi.org/10.29244/jpsl.15.4.669