@misc{indiciae0141023261c3,
  title = {Geologic map of the Polsgrove quadrangle, north-central Kentucky},
  author = {Frank R. Moore},
  year = {1977},
  doi = {10.3133/gq1349},
  url = {https://pubs.usgs.gov/publication/gq1349},
  note = {Source identifier: gq1349}
}