@misc{indiciae56117d6c44a0,
  title = {Geologic map of the Nebo quadrangle, Webster and Hopkins Counties, Kentucky},
  author = {George J. Franklin},
  year = {1969},
  doi = {10.3133/gq777},
  url = {https://pubs.usgs.gov/publication/gq777},
  note = {Source identifier: gq777}
}