Mudenda, Collins, Bupe .G.Mwanza, and M Kondwani. 2016. “Analysis of the Effects of Grind Size on Production of Copper Concentrate: A Case Study of a Mining Company in Zambia”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 26 (1): 259-68. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/4878.