Perdana. Ts, R. et al. 2022. EFFICIENCY ANALYSIS OF ROTARY KILN EQUIPMENT IN FACTORY II PT. SEMEN BATURAJA (PERSERO) Tbk. REVIEW OF THERMAL EFFICIENCY. Jurnal Multidisipliner Bharasumba. 1, 04 (Oct. 2022), 611–618. DOI:https://doi.org/10.62668/bharasumba.v1i04.328.