@misc{indiciae1314cb265ab6,
  title = {Geologic map of the Dubre quadrangle, southern Kentucky},
  author = {Richard Quintin Lewis},
  year = {1967},
  doi = {10.3133/gq676},
  url = {https://pubs.usgs.gov/publication/gq676},
  note = {Source identifier: gq676}
}