@misc{indiciae78488f31fff0,
  title = {The sources of our iron ores. II},
  author = {E. F. Burchard},
  year = {1933},
  doi = {10.1021/ed010p288},
  url = {https://pubs.usgs.gov/publication/70010578},
  note = {Source identifier: 70010578}
}