@misc{indiciaeb2573fd2cccf,
  title = {Geologic map of the Falls of Rough quadrangle, western Kentucky},
  author = {William D. Johnson},
  year = {1977},
  doi = {10.3133/gq1360},
  url = {https://pubs.usgs.gov/publication/gq1360},
  note = {Source identifier: gq1360}
}