Mulato, S., widyotomo, S. and Karia Purwadaria, H. 2006. Performance of Disk Mill Type Mechanical Grinder for Size Reducing Process of Robusta Roasted Beans. Pelita Perkebunan (a Coffee and Cocoa Research Journal). 23, 3 (Dec. 2006). DOI:https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v23i3.39.