@misc{indiciaec3a002a9bd43,
  title = {Geologic map of part of the Owensboro East quadrangle in Daviess County, Kentucky},
  author = {William D. Johnson and Avery E. Smith},
  year = {1968},
  doi = {10.3133/gq751},
  url = {https://pubs.usgs.gov/publication/gq751},
  note = {Source identifier: gq751}
}