@misc{indiciaea169be138288,
  title = {Geologic map of the Tallega quadrangle, east-central Kentucky},
  author = {Douglas F. B. Black},
  year = {1978},
  doi = {10.3133/gq1500},
  url = {https://pubs.usgs.gov/publication/gq1500},
  note = {Source identifier: gq1500}
}