TY - RPRT TI - Stable isotope geochemistry of sphalerite and other mineral matter in coal beds of the Illinois and Forest City basins AU - J. F. Whelan AU - J.C. Cobb AU - R. O. Rye PY - 1988 DO - 10.2113/gsecongeo.83.5.990 UR - https://pubs.usgs.gov/publication/70014447 ID - 70014447 ER -