@misc{indiciaeb01d57ab7b3d,
  title = {Mineral Commodity Summaries 2009},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2009},
  doi = {10.3133/mineral2009},
  url = {https://pubs.usgs.gov/publication/mineral2009},
  note = {Source identifier: mineral2009}
}