@misc{indiciae57b75ffa0082,
  title = {Contributions to economic geology (short papers and preliminary reports), 1912; Part I, Metals and nonmetals except fuels},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1914},
  doi = {10.3133/b540},
  url = {https://pubs.usgs.gov/publication/b540},
  note = {Source identifier: b540}
}