@misc{indiciae90d6e4d79790,
  title = {Geologic map of the Hopkinsville quadrangle, Christian County, Kentucky},
  author = {Harry Klemic},
  year = {1967},
  doi = {10.3133/gq651},
  url = {https://pubs.usgs.gov/publication/gq651},
  note = {Source identifier: gq651}
}