@misc{indiciae3eb70166c0f9,
  title = {Geologic map of the Wayland Quadrangle, Knott and Floyd counties, Kentucky},
  author = {E. Neal Hinrichs and Russell G. Ping},
  year = {1976},
  doi = {10.3133/ofr76691},
  url = {https://pubs.usgs.gov/publication/ofr76691},
  note = {Source identifier: ofr76691}
}