@misc{indiciaef8f165bb7398,
  title = {Geologic map of the Westplains quadrangle, Graves County, Kentucky},
  author = {Roger Warren Swanson and Howard Gordon Wilshire},
  year = {1967},
  doi = {10.3133/gq587},
  url = {https://pubs.usgs.gov/publication/gq587},
  note = {Source identifier: gq587}
}