@misc{indiciae5c0bfdb9521c,
  title = {Geologic map of the Sutherland quadrangle, Daviess County, Kentucky},
  author = {William David Johnson and Avery E. Smith},
  year = {1969},
  doi = {10.3133/gq839},
  url = {https://pubs.usgs.gov/publication/gq839},
  note = {Source identifier: gq839}
}