@misc{indiciae2c0760d5f5c4,
  title = {Geologic map of the Martin quadrangle, Floyd County, Kentucky},
  author = {Charles L. Rice},
  year = {1966},
  doi = {10.3133/gq563},
  url = {https://pubs.usgs.gov/publication/gq563},
  note = {Source identifier: gq563}
}