Gamta Sagni, Mulissa Jida, and Girmaye Kenasa. “Biogas Production Potentials of Coffee Husk Supplemented With Animal Manure”. Journal of Science, Technology and Arts Research 13, no. 3 (September 30, 2024): 58–71. Accessed November 15, 2024. https://journals.wgu.edu.et/index.php/star/article/view/1185.