@misc{indiciae640f8878eb5a,
  title = {Geologic map of the Zachariah quadrangle, east-central Kentucky},
  author = {Douglas F. B. Black},
  year = {1978},
  doi = {10.3133/gq1452},
  url = {https://pubs.usgs.gov/publication/gq1452},
  note = {Source identifier: gq1452}
}