@misc{indiciae98360f6e1201,
  title = {Contributions to economic geology 1906 : Part I - metals and nonmetals except fuels -- Nickel, Uranium, etc.; Lead and Zinc},
  author = {H. S. Gale and George Otis Smith and George Frederick Kay},
  year = {1907},
  doi = {10.3133/b315c},
  url = {https://pubs.usgs.gov/publication/b315C},
  note = {Source identifier: b315C}
}