@misc{indiciaea4b5c71e8ada,
  title = {Geology of the London SW quadrangle [Kentucky]},
  author = {Harold Keith Stager},
  year = {1963},
  doi = {10.3133/gq195},
  url = {https://pubs.usgs.gov/publication/gq195},
  note = {Source identifier: gq195}
}