Economic Feasibility Study of Hard rock Extraction …
Economic Feasibility Study of Hard rock Extraction Using Quarry Mining Method at Companiganj Upazila in Sylhet District, Bangladesh. American Journal of Mining and Metallurgy, 2(2), 23-26. Chowdhury, Mohammad Kashem Hossen, Md. Ashraful Islam Khan, and Mir Raisul Islam. "Economic Feasibility Study of Hard rock Extraction Using Quarry Mining ...