@misc{indiciae7780dd26455e,
  title = {Metal prices in the United States through 2010},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2013},
  doi = {10.3133/sir20125188},
  url = {https://pubs.usgs.gov/publication/sir20125188},
  note = {Source identifier: sir20125188}
}