@misc{indiciae3761293ed3db,
  title = {Geologic map of the Reed quadrangle, Kentucky-Indiana},
  author = {William D. Johnson},
  year = {1972},
  doi = {10.3133/gq1038},
  url = {https://pubs.usgs.gov/publication/gq1038},
  note = {Source identifier: gq1038}
}