@misc{indiciae85501b83b783,
  title = {Geologic map of the Flener quadrangle, Butler and Ohio Counties, Kentucky},
  author = {Benjamin Gildersleeve},
  year = {1972},
  doi = {10.3133/gq1049},
  url = {https://pubs.usgs.gov/publication/gq1049},
  note = {Source identifier: gq1049}
}