@misc{indiciae0f179d2f3766,
  title = {Geology of the Philpot quadrangle, Kentucky},
  author = {Ronald H. Calvert},
  year = {1964},
  doi = {10.3133/gq297},
  url = {https://pubs.usgs.gov/publication/gq297},
  note = {Source identifier: gq297}
}