@misc{indiciae0107ac56a18d,
  title = {Geologic map of the Guthrie quadrangle, Kentucky-Tennessee},
  author = {Harry Klemic},
  year = {1966},
  doi = {10.3133/gq539},
  url = {https://pubs.usgs.gov/publication/gq539},
  note = {Source identifier: gq539}
}