Sittivoradet, Pattamavadee, and Ratchaphon Suntivarakorn. “An Appropriate Approach for Biogas Production and Utilization from Waste Food and Animal Manure in Khon Kaen University”. Engineering and Applied Science Research 40, no. 1 (May 15, 2013): 35–46. Accessed May 18, 2024. https://ph01.tci-thaijo.org/index.php/easr/article/view/8565.