@misc{indiciaebe154b110498,
  title = {Conflict minerals from the Democratic Republic of the Congo: global tantalum processing plants, a critical part of the tantalum supply chain},
  author = {John F. Papp},
  year = {2014},
  doi = {10.3133/fs20143122},
  url = {https://pubs.usgs.gov/publication/fs20143122},
  note = {Source identifier: fs20143122}
}