Averos, I. F. ., Widodo, W., Widiyatami, C. A. ., & Utami, W. E. T. . (2019). Diversity of Ferns (Pteridophyta) in Ancient Volcano Mount Nglanggeran Climbing Track and the Booklet Development for Independent Learning Sources. Proceeding International Conference on Science and Engineering, 2, 101–105. https://doi.org/10.14421/icse.v2.63