@misc{indiciaecbea90f0463f,
  title = {Geologic map of the Shelbyville quadrangle, Shelby County, Kentucky},
  author = {Earle Rupert Cressman},
  year = {1975},
  doi = {10.3133/gq1258},
  url = {https://pubs.usgs.gov/publication/gq1258},
  note = {Source identifier: gq1258}
}