@misc{indiciaea016fc3ea28d,
  title = {Mineral resources of the United States, 1922: Part I - Metals},
  author = {Gerald Francis Loughlin},
  year = {1925},
  doi = {10.3133/70175847},
  url = {https://pubs.usgs.gov/publication/70175847},
  note = {Source identifier: 70175847}
}