@misc{indiciaeed14b94efaae,
  title = {Geologic map of Carroll, Gallatin, Henry, Owen, and Trimble Counties, Kentucky (county group 23)},
  author = {Francis Ramey Hall and Wilbur Nathaniel Palmquist},
  year = {1960},
  doi = {10.3133/ha23},
  url = {https://pubs.usgs.gov/publication/ha23},
  note = {Source identifier: ha23}
}