@misc{indiciaea9bee5824598,
  title = {Geology of the Mammoth Cave quadrangle, Kentucky},
  author = {Donald D. Haynes},
  year = {1964},
  doi = {10.3133/gq351},
  url = {https://pubs.usgs.gov/publication/gq351},
  note = {Source identifier: gq351}
}