@misc{indiciaecedf645a3773,
  title = {Geologic map of the Webbville quadrangle, eastern Kentucky},
  author = {John Edward Carlson},
  year = {1971},
  doi = {10.3133/gq927},
  url = {https://pubs.usgs.gov/publication/gq927},
  note = {Source identifier: gq927}
}