@misc{indiciae2f43bb99f703,
  title = {Geologic map of the Sharpsburg quadrangle, east-central Kentucky},
  author = {Lawrence Vernon Blade},
  year = {1977},
  doi = {10.3133/gq1419},
  url = {https://pubs.usgs.gov/publication/gq1419},
  note = {Source identifier: gq1419}
}