@misc{indiciaeca104f77662e,
  title = {Geologic map of the Frenchburg quadrangle, east-central Kentucky},
  author = {Harry P. Hoge},
  year = {1977},
  doi = {10.3133/gq1390},
  url = {https://pubs.usgs.gov/publication/gq1390},
  note = {Source identifier: gq1390}
}