@misc{indiciae97f398c623bf,
  title = {Geologic map of the Elkton quadrangle, Todd County, Kentucky},
  author = {Fred R. Shawe},
  year = {1967},
  doi = {10.3133/gq650},
  url = {https://pubs.usgs.gov/publication/gq650},
  note = {Source identifier: gq650}
}