@misc{indiciae8379732e7d7c,
  title = {Geology of the Hyden East quadrangle, Kentucky},
  author = {Harold J. Prostka},
  year = {1965},
  doi = {10.3133/gq423},
  url = {https://pubs.usgs.gov/publication/gq423},
  note = {Source identifier: gq423}
}