@misc{indiciae677c7a060785,
  title = {Geologic map of the Halls Gap quadrangle, Lincoln County, Kentucky},
  author = {Gordon Whitney Weir},
  year = {1972},
  doi = {10.3133/gq1009},
  url = {https://pubs.usgs.gov/publication/gq1009},
  note = {Source identifier: gq1009}
}