@misc{indiciae2510212e98c8,
  title = {Preliminary map of rare-earth provinces in the conterminous United States},
  author = {Mortimer Hay Staatz and Theodore J. Armbrustmacher},
  year = {1981},
  doi = {10.3133/ofr79576t},
  url = {https://pubs.usgs.gov/publication/ofr79576T},
  note = {Source identifier: ofr79576T}
}