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), pp. 200-205. doi: 10.37275/nasetjournal.v3i2.37.