@misc{indiciae899e69923559,
  title = {Geologic map of the Hardin quadrangle, Marshall County, Kentucky},
  author = {Glenn R. Scott and L.M. MacCary},
  year = {1968},
  doi = {10.3133/gq759},
  url = {https://pubs.usgs.gov/publication/gq759},
  note = {Source identifier: gq759}
}