Mago, O. Y. T., Nirmalasari, M. A. Y., Kuki, A. D., Bunga, Y. N. and Misa, A. (2021) “Effect of the Type of Organic Waste and Retention Time on Biogas Production from Cow Dung”, Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati, 5(3), pp. 155–162. doi: 10.24002/biota.v5i3.3682.