@misc{indiciaedb5bc46f3d5e,
  title = {Platinum-group elements in sedimentary environments in the conterminous United States},
  author = {Jocelyn A. Peterson and R. B. Finkelman and S.J. Tewalt},
  year = {1994},
  doi = {10.3133/b2049a},
  url = {https://pubs.usgs.gov/publication/b2049A},
  note = {Source identifier: b2049A}
}