@misc{indiciaec579ac36ba08,
  title = {Mineral resources of the United States, 1908: Part I - Metallic products},
  author = {U.S. Geological Survey},
  year = {1909},
  doi = {10.3133/70175788},
  url = {https://pubs.usgs.gov/publication/70175788},
  note = {Source identifier: 70175788}
}