@misc{indiciae82626099e381,
  title = {Geologic map of the Seitz quadrangle, eastern Kentucky},
  author = {Richard W. Spengler},
  year = {1978},
  doi = {10.3133/gq1435},
  url = {https://pubs.usgs.gov/publication/gq1435},
  note = {Source identifier: gq1435}
}