@misc{indiciaedb2e1dee43fc,
  title = {Geologic map of the Horse Cave quadrangle, Barren and Hart Counties, Kentucky},
  author = {Donald Duane Haynes},
  year = {1966},
  doi = {10.3133/gq558},
  url = {https://pubs.usgs.gov/publication/gq558},
  note = {Source identifier: gq558}
}