Silayo, Dos Santos, and George Migunga. “Productivity and Costs Modeling for Tree Harvesting Operations Using Chainsaws in Plantation Forests, Tanzania”. International Journal of Engineering & Technology 3, no. 4 (September 27, 2014): 464–472. Accessed August 17, 2024. https://sciencepubco.com/index.php/ijet/article/view/3407.