@misc{indiciae554735d07a45,
  title = {Geologic map of part of the Smithland quadrangle, Livingston County, Kentucky},
  author = {Dewey Harold Amos},
  year = {1967},
  doi = {10.3133/gq657},
  url = {https://pubs.usgs.gov/publication/gq657},
  note = {Source identifier: gq657}
}