“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, vol. 6, no. 2, Oct. 2021, pp. 39-43, https://doi.org/10.33019/mineral.v6i2.3094.