@misc{indiciae39439da5633a,
  title = {Geology of the Landsaw quadrangle, Kentucky},
  author = {Wallace R. Hansen and J. E. Johnston},
  year = {1963},
  doi = {10.3133/gq201},
  url = {https://pubs.usgs.gov/publication/gq201},
  note = {Source identifier: gq201}
}