@misc{indiciaea325096a7cf0,
  title = {Geologic maps of some kyanite deposits in Virginia and North and South Carolina},
  author = {Gilbert H. Espenshade and D.B. Potter},
  year = {1953},
  doi = {10.3133/ofr200},
  url = {https://pubs.usgs.gov/publication/ofr200},
  note = {Source identifier: ofr200}
}