@misc{indiciaedd39bde21c4a,
  title = {Geologic setting and water quality of selected basins in the active coal-mining areas of Ohio, 1989-91, with a summary of water quality for 1985-91},
  author = {A. C. Sedam and D.S. Francy},
  year = {1993},
  doi = {10.3133/wri934094},
  url = {https://pubs.usgs.gov/publication/wri934094},
  note = {Source identifier: wri934094}
}