pt bukit makmur mandiri utama tbk buma coal mining contracto
PT Bukit Makmur Mandiri Utama (BUMA) 99designs, Summary and recommendation BUMA is Indonesia''s secondlargest mining contractor, with a 20% market share In 2017, Berau Coal, Geo Energy, Adaro and Kideco accounted for 92% of its total revenu With 70% of its revenues tied to prevailing coal price, near term earnings growth should be supported with Newcastle .