@misc{indiciaeee30aa2c69d0,
  title = {Map showing sulfate in selected streams in Kentucky River Area Development District, Kentucky},
  author = {R. W. Davis},
  year = {1978},
  doi = {10.3133/mf865f},
  url = {https://pubs.usgs.gov/publication/mf865F},
  note = {Source identifier: mf865F}
}