@misc{indiciae9d43f184ed92,
  title = {Quality of surface water in the coal mining area of Southwest Virginia},
  author = {S. M. Rogers and P.W. Hufschmidt},
  year = {1980},
  doi = {10.3133/ofr80769},
  url = {https://pubs.usgs.gov/publication/ofr80769},
  note = {Source identifier: ofr80769}
}