@misc{indiciae23a54fd8320c,
  title = {Geologic map of the Morganfield quadrangle, Union County, Kentucky},
  author = {William D. Johnson and Avery E. Smith and G. M. Fairer},
  year = {1975},
  doi = {10.3133/gq1269},
  url = {https://pubs.usgs.gov/publication/gq1269},
  note = {Source identifier: gq1269}
}