@misc{indiciae983adb580bfe,
  title = {Platinum-group elements in southern Africa: mineral inventory and an assessment of undiscovered mineral resources},
  author = {Michael L. Zientek and J. Douglas Causey and Heather L. Parks and Robert J. Miller},
  year = {2014},
  doi = {10.3133/sir20105090q},
  url = {https://pubs.usgs.gov/publication/sir20105090Q},
  note = {Source identifier: sir20105090Q}
}