Syamsuri, Yustia Wulandari Mirzayanti and Sigit Setiawan (2021) “Pengaruh Konsentrasi NaOH, Urea, dan Rumen terhadap Performa Generator Berbahan Bakar Biogas”, Journal of Research and Technology, 7(1), pp. 71–82. doi: 10.55732/jrt.v7i1.430.