@misc{indiciae08396fcc52e9,
  title = {Geologic map of the Sitka Quadrangle, Johnson and Lawrence counties, Kentucky},
  author = {Philip Thayer Hayes},
  year = {1977},
  doi = {10.3133/ofr77157},
  url = {https://pubs.usgs.gov/publication/ofr77157},
  note = {Source identifier: ofr77157}
}