@misc{indiciae980ef0a1023a,
  title = {Mineral resources of the United States, 1916: Part I - Metals},
  author = {Hiram Dryer McCaskey},
  year = {1919},
  doi = {10.3133/70175817},
  url = {https://pubs.usgs.gov/publication/70175817},
  note = {Source identifier: 70175817}
}