@misc{indiciae7491182e33ed,
  title = {Geologic map of the Fount quadrangle, Knox County, Kentucky},
  author = {Russell G. Ping and R.E. Sergeant},
  year = {1978},
  doi = {10.3133/gq1487},
  url = {https://pubs.usgs.gov/publication/gq1487},
  note = {Source identifier: gq1487}
}