@misc{indiciae90d53de72b43,
  title = {Geologic map of the Louisville East quadrangle, Jefferson County, Kentucky},
  author = {Roy Clark Kepferle},
  year = {1974},
  doi = {10.3133/gq1203},
  url = {https://pubs.usgs.gov/publication/gq1203},
  note = {Source identifier: gq1203}
}