@misc{indiciaef439684517f5,
  title = {Geologic map of parts of the Dekoven and Saline Mines quadrangles, Crittenden and Union Counties, Kentucky},
  author = {Thomas M. Kehn},
  year = {1974},
  doi = {10.3133/gq1147},
  url = {https://pubs.usgs.gov/publication/gq1147},
  note = {Source identifier: gq1147}
}