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		Adanyana, I., 		Nindha, T., & 		Surata, I.
2020 Oct  9.  Pengaruh Lamanya Waktu Penyimpanan Biogas Terhadap Komposisi Biogas. Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin. [Online] 6:1