@misc{indiciae6edd0cd3b60b,
  title = {Geology of the Blackwater quadrangle, Kentucky},
  author = {Harold Keith Stager},
  year = {1964},
  doi = {10.3133/gq304},
  url = {https://pubs.usgs.gov/publication/gq304},
  note = {Source identifier: gq304}
}