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 [Internet]. 2021 Oct. 1 [cited 2026 Apr. 18];6(2):39-43. Available from: https://journal.ubb.ac.id/index.php/mineral/article/view/3094