@misc{indiciae54fca4305687,
  title = {Geologic map of the Dawson Springs SW quadrangle, western Kentucky},
  author = {Dan E. Hansen},
  year = {1973},
  doi = {10.3133/gq1061},
  url = {https://pubs.usgs.gov/publication/gq1061},
  note = {Source identifier: gq1061}
}