@misc{indiciae16c614fcf2dd,
  title = {Geochemical and geohydrological characteristics of bedrock and spol from two methods of mining at a reclaimed surface coal mine, Clarion County, PA, USA},
  author = {Charles A. Cravotta and Keith Brady and Linda C. Gustafson-Minnich and Michael R. DiMatteo},
  year = {1994},
  url = {https://pubs.usgs.gov/publication/70189551},
  note = {Source identifier: 70189551}
}