Admasie, M., Temesgen, T. and Kebede, F. 2022. Comparison of biogas productivity of calabash waste mixed in selected ratios with sheep and donkey dungs. Ethiopian Journal of Science and Sustainable Development. 10, 1 (Dec. 2022), 7-19. DOI:https://doi.org/10.20372/ejssdastu:v10.i1.2023.458.