@misc{indiciae74856756514b,
  title = {Geologic map of the Germantown quadrangle, Mason and Bracken Counties, Kentucky},
  author = {William F. Outerbridge},
  year = {1971},
  doi = {10.3133/gq971},
  url = {https://pubs.usgs.gov/publication/gq971},
  note = {Source identifier: gq971}
}