@misc{indiciaeff166407d9fc,
  title = {Surficial geologic map of Kentucky River Area Development District and vicinity, Eastern Kentucky},
  author = {Wayne L. Newell},
  year = {1977},
  doi = {10.3133/mf865b},
  url = {https://pubs.usgs.gov/publication/mf865B},
  note = {Source identifier: mf865B}
}