@misc{indiciae577dd5b58656,
  title = {Distribution of water-quality characteristics that may indicate the presence of acid mine drainage in the eastern coal province of the United States},
  author = {Kim L. Wetzel and Scott A. Hoffman},
  year = {1989},
  doi = {10.3133/ha705},
  url = {https://pubs.usgs.gov/publication/ha705},
  note = {Source identifier: ha705}
}