TY - RPRT TI - Geochemical and geohydrological characteristics of bedrock and spol from two methods of mining at a reclaimed surface coal mine, Clarion County, PA, USA AU - Charles A. Cravotta AU - Keith Brady AU - Linda C. Gustafson-Minnich AU - Michael R. DiMatteo PY - 1994 UR - https://pubs.usgs.gov/publication/70189551 ID - 70189551 ER -