@misc{indiciae392b3f96f647,
  title = {Platinum-group metals--world supply and demand},
  author = {David R. Wilburn and Donald I. Bleiwas},
  year = {2005},
  doi = {10.3133/ofr20041224},
  url = {https://pubs.usgs.gov/publication/ofr20041224},
  note = {Source identifier: ofr20041224}
}