@misc{indiciae5918e453a464,
  title = {Map showing high-purity quartzite in California, Nevada, Utah, Idaho, and Montana},
  author = {Keith B. Ketner},
  year = {1976},
  doi = {10.3133/mf821},
  url = {https://pubs.usgs.gov/publication/mf821},
  note = {Source identifier: mf821}
}