Darmanto Silaban, Achmad Siddik Thoha and Muhammad Taufiq 2024. Analisis Spasial Pengembangan Kawasan Air Terjun Janji Kabupaten Humbang Hasundutan. Journal Serambi Engineering. 9, 3 (Jul. 2024). DOI:https://doi.org/10.32672/jse.v9i3.1939.