Tarigan AB, Delvian D, Aththorick TA. Vegetation Analysis of Mount Sipiso-Piso Forest Area, Merek District, Karo Regency, North Sumatra. TGEO [Internet]. 2022 Dec. 5 [cited 2025 Jul. 9];11(2):73-80. Available from: https://jurnal.unimed.ac.id/2012/index.php/tgeo/article/view/39140