@misc{indiciae8fbdff0ad39e,
  title = {Geologic map of the Bordley quadrangle, Union and Webster Counties, Kentucky},
  author = {Thomas M. Kehn},
  year = {1975},
  doi = {10.3133/gq1275},
  url = {https://pubs.usgs.gov/publication/gq1275},
  note = {Source identifier: gq1275}
}