TY - RPRT TI - Geochemistry and petrology of selected coal samples from Sumatra, Kalimantan, Sulawesi, and Papua, Indonesia AU - H. E. Belkin AU - S.J. Tewalt AU - J.C. Hower AU - J.D. Stucker AU - J.M.K. O’Keefe PY - 2009 DO - 10.1016/j.coal.2008.08.001 UR - https://pubs.usgs.gov/publication/70033238 ID - 70033238 ER -