@misc{indiciae91c9937404ee,
  title = {Mineral resources of the United States, 1923: Part II - Nonmetals},
  author = {Frank James Katz},
  year = {1926},
  doi = {10.3133/70175850},
  url = {https://pubs.usgs.gov/publication/70175850},
  note = {Source identifier: 70175850}
}