Umar, Iswandi. “Policy Directions for Control of Land Use Dynamics in the Antokan Watershed, West Sumatra Province”. Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 11, no. 1 (April 1, 2021): 10–18. Accessed January 14, 2026. https://journal.ipb.ac.id/jpsl/article/view/32286.