“The Run Off and Erosion on Eucalyptus Plantation Pt. Toba Pulp Lestari Aek Nauli Sector Simalungun District”. International Journal of Scientific Research and Management (IJSRM) 8, no. 03 (March 24, 2020): 285–288. Accessed April 29, 2024. https://ijsrm.net/index.php/ijsrm/article/view/2625.