Pasaribu, N. 2022. Inventory of Ferns (Class: Filicinae) in West Block, Batang Toru Forest, North Tapanuli North Sumatra. International Journal of Ecophysiology. 3, 2 (Nov. 2022), 246-273. DOI:https://doi.org/10.32734/ijoep.v3i2.10098.