Barokah, Septi Muflikhatul, Juang Rata Matangaran, and Gunawan santosa. 2017. “Cost Analysis of Felling With Chainsaw and Skidding With Farm Tractor in KPH Saradan”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 33 (1): 89-102. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/7205.