@misc{indiciaea7a3775cea8c,
  title = {Geology of the Mattingly quadrangle, Kentucky-Indiana},
  author = {Lorin D. Clark and Max D. Crittenden},
  year = {1965},
  doi = {10.3133/gq361},
  url = {https://pubs.usgs.gov/publication/gq361},
  note = {Source identifier: gq361}
}