@misc{indiciae03545057acea,
  title = {Geologic map of the Gratz quadrangle, Owen and Henry Counties, Kentucky},
  author = {Frank R. Moore},
  year = {1977},
  doi = {10.3133/gq1359},
  url = {https://pubs.usgs.gov/publication/gq1359},
  note = {Source identifier: gq1359}
}