@misc{indiciae203981ecbdb0,
  title = {Geologic map of part of the Jamboree quadrangle, Pike County, Kentucky},
  author = {William F. Outerbridge and Roger Van Vloten},
  year = {1968},
  doi = {10.3133/gq775},
  url = {https://pubs.usgs.gov/publication/gq775},
  note = {Source identifier: gq775}
}