@misc{indiciaec8e0317d63f9,
  title = {Geologic map of part of the Henderson quadrangle, Henderson County, Kentucky},
  author = {William D. Johnson},
  year = {1973},
  doi = {10.3133/gq1074},
  url = {https://pubs.usgs.gov/publication/gq1074},
  note = {Source identifier: gq1074}
}