@misc{indiciae2bf4ba76720f,
  title = {Geology of the Haldeman quadrangle, Kentucky},
  author = {Sam H. Patterson and John W. Hosterman},
  year = {1961},
  doi = {10.3133/gq169},
  url = {https://pubs.usgs.gov/publication/gq169},
  note = {Source identifier: gq169}
}