SAMSURI; AFFIFUDDIN, Yunus; FAISAL RIDHO. Study of policy determination to create a healthy watershed: A case study of Lepan watershed in Langkat district, North Sumatera, Indonesia. Journal of Sylva Indonesiana, [S. l.], v. 5, n. 01, p. 33–46, 2022. DOI: 10.32734/jsi.v5i01.6222. Disponível em: https://talenta.usu.ac.id/Jsi/article/view/6222. Acesso em: 12 aug. 2026.