Simanjuntak, Hengki, .Hendrayanto, and Nining Puspaningsih. “Calculation Methods of Topographic Factors Modification Using Data Digital Elevation Model (DEM) To Predict Erosion”. Media Konservasi 22, no. 3 (March 28, 2018): 242-251. Accessed January 28, 2022. https://journal.ipb.ac.id/index.php/konservasi/article/view/20839.