@misc{indiciae46f2db3a6211,
  title = {Geologic map of the Noble Quadrangle, eastern Kentucky},
  author = {E. Neal Hinrichs},
  year = {1977},
  doi = {10.3133/ofr77620},
  url = {https://pubs.usgs.gov/publication/ofr77620},
  note = {Source identifier: ofr77620}
}