“Production of Biogas from Mono- and Co-Digestion of Agricultural Waste (Cow Dung, Chicken Dropping, and Rice Husk)”. Iraqi Journal of Science 62, no. 1 (January 30, 2021): 45–60. Accessed April 30, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2154.