Natalina, Hardoyo, Dede Ibnu, Veronica Situmorang, Cut Mutiawati, and Softanur. 2024. “The Used of Variuos Biomass Waste As Raw Material Biogass Production Using Cow Dung As Source of Microbe by Continuously-Anaerobic Fermentation on the 15 Liter Reactor”. Engineering And Technology Journal 9 (9):5060-64. https://doi.org/10.47191/etj/v9i09.09.