Open Access Journals
Gautama R (1994) Acid Water Problem in Bukit Asam Coal Mine, South Sumatra, Indonesia. International Mine Water Association, 1994 Proceedings. 43. Amijaya H, Littke R (2006) Properties of thermally metamorphosed coal from Tanjung Enim Area, South Sumatra Basin, Indonesia with special reference to the coalification path of macerals.