TY - RPRT TI - Quality of surface water in the coal-mining areas of western Maryland and adjacent areas of Pennsylvania and West Virginia from April 1979 to June 1980 AU - W. W. Staubitz PY - 1981 DO - 10.3133/ofr81812 UR - https://pubs.usgs.gov/publication/ofr81812 ID - ofr81812 ER -