TY - RPRT TI - Sulfur variability and petrology of the Lower Block Coal Member (Pennsylvanian) in Southwest Indiana AU - P.L. Padgett AU - S.M. Rimmer AU - J.C. Ferm AU - J.C. Hower AU - C.F. Eble AU - Maria Mastalerz PY - 1999 DO - 10.1016/s0166-5162(98)00041-x UR - https://pubs.usgs.gov/publication/70021792 ID - 70021792 ER -