@misc{indiciae164a25780974,
  title = {Geologic map of the Rich Hole Roadless Area, Alleghany and Rockbridge counties, Virginia},
  author = {F. G. Lesure and S. W. Nicholson},
  year = {1985},
  doi = {10.3133/mf1760a},
  url = {https://pubs.usgs.gov/publication/mf1760A},
  note = {Source identifier: mf1760A}
}