@misc{indiciae3abd8dbd5f72,
  title = {Geologic map of the Cowcreek Quadrangle, Owsley and Breathitt counties, Kentucky},
  author = {William F. Outerbridge},
  year = {1977},
  doi = {10.3133/ofr77522},
  url = {https://pubs.usgs.gov/publication/ofr77522},
  note = {Source identifier: ofr77522}
}