“ANALISIS PERMASALAHAN PENGELOLAAN SUNGAI DELI (PROBLEM ANALYSIS OF DELI RIVER MANAGEMENT)”. Inovasi 14, no. 1 (August 8, 2018): 77–82. Accessed January 11, 2026. https://jurnal.sumutprov.go.id/index.php/inovasi/article/view/89.