@misc{indiciaed98b121aff3a,
  title = {Geologic map of the Mazie quadrangle, eastern Kentucky},
  author = {William F. Outerbridge},
  year = {1977},
  doi = {10.3133/gq1388},
  url = {https://pubs.usgs.gov/publication/gq1388},
  note = {Source identifier: gq1388}
}