@misc{indiciae21eedb7baf39,
  title = {Geologic map of the Kayjay quadrangle and part of the Fork Ridge quadrangle, Bell and Knox Counties, Kentucky},
  author = {Edwin K. Maughan},
  year = {1972},
  doi = {10.3133/ofr73375},
  url = {https://pubs.usgs.gov/publication/ofr73375},
  note = {Source identifier: ofr73375}
}