@misc{indiciae76b023d1cf23,
  title = {Geologic map of the Guage quadrangle, Breathitt and Magoffin Counties, Kentucky},
  author = {K. Y. Lee and Walter Danilchik and Charles L. Rice},
  year = {1977},
  doi = {10.3133/gq1416},
  url = {https://pubs.usgs.gov/publication/gq1416},
  note = {Source identifier: gq1416}
}