@misc{indiciae81ad2ced7cba,
  title = {Geologic map of the McBrayer quadrangle, Anderson and Mercer Counties, Kentucky},
  author = {Earle Rupert Cressman},
  year = {1973},
  doi = {10.3133/gq1079},
  url = {https://pubs.usgs.gov/publication/gq1079},
  note = {Source identifier: gq1079}
}