@misc{indiciae27511107b986,
  title = {Contributions to economic geology (short papers and preliminary reports), 1930, Part I, Metals and nonmetals except fuels. A graphic history of metal mining in Idaho},
  author = {C. P. Ross},
  year = {1931},
  doi = {10.3133/b821a},
  url = {https://pubs.usgs.gov/publication/b821A},
  note = {Source identifier: b821A}
}