@misc{indiciae76b03bd4b130,
  title = {Geologic map of the Dawson Springs SE quadrangle, Christian and Hopkins Counties, Kentucky},
  author = {Robert Denny Trace},
  year = {1977},
  doi = {10.3133/gq1365},
  url = {https://pubs.usgs.gov/publication/gq1365},
  note = {Source identifier: gq1365}
}