TRYONO, F. Y. (2015). GAS METANA BATUBARA ENERGI BARU, PERANAN PUSDIKLAT MIGAS. Swara Patra : Majalah Ilmiah PPSDM Migas, 5(3). Retrieved from https://ejurnal.ppsdmmigas.esdm.go.id/sp/index.php/swarapatra/article/view/155