@misc{indiciae9e3986b4da71,
  title = {Quality of surface water in the coal-mining region, southwestern Indiana, October 1979 to September 1980},
  author = {D.E. Renn},
  year = {1983},
  doi = {10.3133/ofr83680},
  url = {https://pubs.usgs.gov/publication/ofr83680},
  note = {Source identifier: ofr83680}
}