@misc{indiciaeae38d75f20a3,
  title = {Geologic map of the Buckhorn quadrangle, southeastern Kentucky},
  author = {Walter Danilchik and Richard Quintin Lewis},
  year = {1978},
  doi = {10.3133/gq1449},
  url = {https://pubs.usgs.gov/publication/gq1449},
  note = {Source identifier: gq1449}
}