TY - RPRT TI - Geochemical and mineralogical sampling of the Devonian shales in the Broadtop synclinorium, Appalachian basin, in Virginia, West Virginia, Maryland, and Pennsylvania AU - Catherine B. Enomoto AU - James L. Coleman AU - Christopher S. Swezey AU - Patrick W. Niemeyer AU - Frank T. Dulong PY - 2015 DO - 10.3133/ofr20151061 UR - https://pubs.usgs.gov/publication/ofr20151061 ID - ofr20151061 ER -