@misc{indiciae9bd1f9615136,
  title = {Geologic map of the Liberty quadrangle, Casey County, Kentucky},
  author = {Alfred R. Taylor and Richard Quintin Lewis},
  year = {1971},
  doi = {10.3133/gq946},
  url = {https://pubs.usgs.gov/publication/gq946},
  note = {Source identifier: gq946}
}