Mokh Ausin Al Qoroni et al. 2025. Analysis of Sawdust and Coal Biomass Fuel Variations on the Efficiency of 660 MW Multistage Turbine Steam Power Plant. Jurnal Rekayasa Mesin. 20, 3 (Dec. 2025), 445–454. DOI:https://doi.org/10.32497/jrm.v20i3.6549.