Suyitno, S., Juwana, W.E. and Muqoffa, M. 2025. Enhancing Biogas Production through the Co-Digestion of Indigofera and Cow Manure for Electricity Generation. Journal of Engineering and Technological Sciences. 57, 3 (Mar. 2025), 291–302. DOI:https://doi.org/10.5614/j.eng.technol.sci.2025.57.3.1.