@misc{indiciaef375a3ce47a2,
  title = {Geologic map of the Canoe Quadrangle, Breathitt and Perry counties, Kentucky},
  author = {E. Neal Hinrichs},
  year = {1978},
  doi = {10.3133/ofr78568},
  url = {https://pubs.usgs.gov/publication/ofr78568},
  note = {Source identifier: ofr78568}
}