@misc{indiciae9db760074046,
  title = {Geologic map of the Campton Quadrangle, east-central Kentucky},
  author = {T. Dennis Coskren and Harry P. Hoge},
  year = {1978},
  doi = {10.3133/ofr78420},
  url = {https://pubs.usgs.gov/publication/ofr78420},
  note = {Source identifier: ofr78420}
}