@misc{indiciae31af06bfe1d6,
  title = {Geology of the Clarkson quadrangle, Kentucky},
  author = {Ernest Earwood Glick},
  year = {1963},
  doi = {10.3133/gq278},
  url = {https://pubs.usgs.gov/publication/gq278},
  note = {Source identifier: gq278}
}