@misc{indiciae16d16415afd4,
  title = {Iron ore resources of South America and their utilization},
  author = {Harry Klemic and Margaret Cooper},
  year = {1977},
  doi = {10.3133/ofr77745},
  url = {https://pubs.usgs.gov/publication/ofr77745},
  note = {Source identifier: ofr77745}
}