@misc{indiciae0ce8723543c2,
  title = {Consultancy services in platinum-group mineral exploration for the Directorate of Mineral Resources},
  author = {Michael L. Zientek and Norman J. Page},
  year = {1990},
  doi = {10.3133/ofr90527},
  url = {https://pubs.usgs.gov/publication/ofr90527},
  note = {Source identifier: ofr90527}
}