@misc{indiciae3279592e8979,
  title = {Geologic map of part of the Friendship quadrangle, Lewis and Greenup Counties, Kentucky},
  author = {Ralph Leroy Erickson},
  year = {1966},
  doi = {10.3133/gq526},
  url = {https://pubs.usgs.gov/publication/gq526},
  note = {Source identifier: gq526}
}