Patimah, S., and C. Hasannah. “Calculating Mass Balance And Energy Balance In Finish Mill 6 (6zi) Type Opc Using Purified Gypsum”. Jurnal Ilmiah Wahana Pendidikan, Vol. 10, no. 1, Jan. 2024, pp. 786-90, doi:10.5281/Zenodo.10472212.