@misc{indiciaeda9f3ffd3365,
  title = {Geologic map of the Mayking quadrangle, Letcher and Knott counties, Kentucky},
  author = {Charles L. Rice},
  year = {1976},
  doi = {10.3133/gq1309},
  url = {https://pubs.usgs.gov/publication/gq1309},
  note = {Source identifier: gq1309}
}