Admasie, Moges, Tewabech Temesgen, and Fasika Kebede. “Production of Biogas from Calabash Waste Mixed in Selected Ratios With Sheep and Donkey Dungs”. Ethiopian Journal of Science and Sustainable Development 10, no. 1 (December 22, 2022): 7-19. Accessed October 22, 2024. https://ejssd.astu.edu.et/index.php/EJSSD/article/view/458.