TY  - RPRT
TI  - Water-quality data for two surface coal mines reclaimed with alkaline waste or urban sewage sludge, Clarion County, Pennsylvania, May 1983 through November 1989
AU  - D.L. Dugas
AU  - C.A. Cravotta
AU  - D. A. Saad
PY  - 1993
DO  - 10.3133/ofr93115
UR  - https://pubs.usgs.gov/publication/ofr93115
ID  - ofr93115
ER  -