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Analisis Kelayakan Ekonomi Pada Rencana Penggantian Alat Mekanis Penambangan Batubara Di PT XYZ, Kabupaten Tanah Bumbu, Provinsi Kalimantan Selatan: Analysis on Coal Mining Equipment Replacement Plan at PT XYZ, Tanah Bumbu Regency, Kalimantan Selatan Province. mineral 2021, 6 (2), 39-43. https://doi.org/10.33019/mineral.v6i2.3094.