“REVENUE CONTRIBUTION THE COMMUNITY FORESTS OF Styrax Spp. ON FARMERS HOUSEHOLD INCOME (Case Studies: Simarigung VillageDistric of DoloksanggulHumbang Hasundutan Regency North Sumatera)”. Jurnal Ilmu Ilmu Kehutanan 1, no. 2 (October 3, 2017): 10–17. Accessed August 2, 2025. https://jiik.ejournal.unri.ac.id/index.php/JIIK/article/view/29.