@misc{indiciae7f0c3c1859cf,
  title = {Contributions to economic geology, 1912; Part I, Metals and nonmetals except fuels-Copper},
  author = {James Madison Hill and F. L. Ransome},
  year = {1914},
  doi = {10.3133/b540d},
  url = {https://pubs.usgs.gov/publication/b540D},
  note = {Source identifier: b540D}
}