@misc{indiciae06e5242dbc66,
  title = {Geologic map of the Tompkinsville quadrangle, and part of the Union Hill quadrangle, Monroe County, Kentucky},
  author = {Irving Jerome Witkind},
  year = {1971},
  doi = {10.3133/gq937},
  url = {https://pubs.usgs.gov/publication/gq937},
  note = {Source identifier: gq937}
}