@misc{indiciae2474f1628c3b,
  title = {Geologic map of the Wiborg quadrangle, McCreary County, Kentucky},
  author = {J. Hiram Smith},
  year = {1970},
  doi = {10.3133/gq867},
  url = {https://pubs.usgs.gov/publication/gq867},
  note = {Source identifier: gq867}
}