@misc{indiciae2d4105953699,
  title = {Geologic map of the Grove Center quadrangle, Kentucky-Illinois and part of the Shawneetown quadrangle, Kentucky},
  author = {James Edward Palmer},
  year = {1976},
  doi = {10.3133/gq1314},
  url = {https://pubs.usgs.gov/publication/gq1314},
  note = {Source identifier: gq1314}
}