@misc{indiciae25190bd69183,
  title = {Mineral resources of the United States, 1919: Part I - Metals},
  author = {Gerald Francis Loughlin},
  year = {1922},
  doi = {10.3133/70175828},
  url = {https://pubs.usgs.gov/publication/70175828},
  note = {Source identifier: 70175828}
}