@misc{indiciae20373a201689,
  title = {Geology of the Sawyer quadrangle, Kentucky},
  author = {Willard P. Puffett},
  year = {1962},
  doi = {10.3133/gq179},
  url = {https://pubs.usgs.gov/publication/gq179},
  note = {Source identifier: gq179}
}