@misc{indiciae3ee613a8ab77,
  title = {Geologic map of part of the Cave In Rock quadrangle, Crittenden County, Kentucky},
  author = {Robert Denny Trace},
  year = {1974},
  doi = {10.3133/gq1201},
  url = {https://pubs.usgs.gov/publication/gq1201},
  note = {Source identifier: gq1201}
}