Okewale, A. and Babayemi, A. K. (2018) “Anaerobic Co – Digestion of Elephant Grass, Pig and Poultry Droppings for the Production of Biogas”, Journal of Renewable Energy and Smart Grid Technology, 13(1). Available at: https://ph01.tci-thaijo.org/index.php/RAST/article/view/109708 (Accessed: 6 May 2024).