Marisa Oktavia, E. T. Putra, and R. M. Oswara. “Estimasi Rata- Rata Tingkat Pengembalian Modal Berdasarkan Biaya Eksplorasi Terhadap Harga Jual Batubara Di PT. Andalas Nusa Indah Kabupaten Bungo , Provinsi Jambi: Average Rate Estimation of Return on Capital Based on Exploration Costs on Coal Selling Price at PT. Andalas Nusa Indah Bungo District, Jambi Province”. JTK (Jurnal Teknik Kebumian), vol. 10, no. 01, Aug. 2024, pp. 51-55, doi:10.22437/jtk.v10i01.29064.