@misc{indiciae230d93f25227,
  title = {Preliminary Geologic Map Of The Livingston Quadrangle, Southeastern Kentucky},
  author = {William Randall Brown and M.J. Osolnik},
  year = {1975},
  doi = {10.3133/ofr7538},
  url = {https://pubs.usgs.gov/publication/ofr7538},
  note = {Source identifier: ofr7538}
}