Analisis sensitivitas perubahan harga batubara dan volume penjualan untuk melihat ketahanan perusahaan pertambangan batubara di Indonesia = Sensitivity analysis of coal price and sales volume changes for seeing coal mining company endurance in Indonesia

Perbandingan produktivitas antar industri antar wilayah di Indonesia tahun 1981-1990

Review of geological and mining condition at Ombilin, Indonesia, in comparison with those at other collieries, in Australia and the United Kingdom

Gasifikasi batubara sebagai alternatif energi baru dalam diversifikasi energi di Indonesia = Coal gasification as an alternative energy in Indonesia national energy diversification

Analisis competitiveness pada industri pertambangan sektor logam mulia dan batubara di Indonesia = Competitiveness analysis of metal and coal mining industry in Indonesia