@misc{indiciae53451083c32e,
  title = {Mineral summaries for Oregon; U.S. Bureau of Land Management wilderness study areas},
  author = {M. F. Diggles},
  year = {1991},
  doi = {10.3133/ofr91139},
  url = {https://pubs.usgs.gov/publication/ofr91139},
  note = {Source identifier: ofr91139}
}