@misc{indiciae6d433683232e,
  title = {Geologic map of the Colfax quadrangle, east-central Kentucky},
  author = {Robert Carter McDowell},
  year = {1976},
  doi = {10.3133/gq1332},
  url = {https://pubs.usgs.gov/publication/gq1332},
  note = {Source identifier: gq1332}
}