@misc{indiciae3f133e3826d1,
  title = {Bedrock map of Kentucky River Area Development District, southeastern Kentucky},
  author = {Wayne L. Newell and Charles L. Rice},
  year = {1975},
  doi = {10.3133/ofr7584},
  url = {https://pubs.usgs.gov/publication/ofr7584},
  note = {Source identifier: ofr7584}
}