@misc{indiciaec848da67f4e1,
  title = {Geologic map of the Vanceburg quadrangle, Kentucky-Ohio},
  author = {Robert Hamilton Morris and Kenneth Lee Pierce},
  year = {1967},
  doi = {10.3133/gq598},
  url = {https://pubs.usgs.gov/publication/gq598},
  note = {Source identifier: gq598}
}