TY - RPRT TI - Water resources and the hydrologic effects of coal mining in Washington County, Pennsylvania AU - Donald R. Williams AU - John K. Felbinger AU - Paul J. Squillace PY - 1993 DO - 10.3133/ofr89620 UR - https://pubs.usgs.gov/publication/ofr89620 ID - ofr89620 ER -