Promdan, S. ., Panananda, N. ., Munsin, R. ., Chaichana, S., Yeunyongkul, P. ., & Khrabunma, S. . (2023). Optimum Design of Hammer Mill for Grinding Leonardite. Journal of Technical Education Science, 18(Special Issue 01), 41–55. https://doi.org/10.54644/jte.74.2023.1335