@misc{indiciae6ba701e899e3,
  title = {Geologic map of the Claysville quadrangle, northeastern Kentucky},
  author = {Stanley J. Luft},
  year = {1976},
  doi = {10.3133/gq1341},
  url = {https://pubs.usgs.gov/publication/gq1341},
  note = {Source identifier: gq1341}
}