I Wayan Angga Widianta Putra, Sukadana, I.G.K., I Gusti Ngurah Putu Tenaya and I Putu Widiarta 2023. The Effect of Types of Biogas and Methanol Purification and Loading as Fuel for Four-Stroke Generators on Exhaust Emissions. Natural Sciences Engineering and Technology Journal. 3, 2 (Mar. 2023), 200-205. DOI:https://doi.org/10.37275/nasetjournal.v3i2.37.