@misc{indiciae7fea63ad683e,
  title = {Quartz crystal deposits of southwestern Virginia and western North Carolina},
  author = {John Beaver Mertie},
  year = {1959},
  doi = {10.3133/b1072d},
  url = {https://pubs.usgs.gov/publication/b1072D},
  note = {Source identifier: b1072D}
}