Spatial distribution of ulin (Eusideroxylon zwageri Teijsm. & Binnend.) based on slope position and its stand structure in the forest area of tabalong district Journal title: Journal of Biodiversity and Environmental Sciences (JBES) Authors: Suyanto, Luthfi Rayes, Sudarto, Bambang Joko Priatmadi Subject(s): Biological Sciences, Environmental Sciences, Biology