@misc{indiciae38a604fd0aa1,
  title = {Iron in the United States, exclusive of Alaska and Hawaii},
  author = {Martha S. Carr and Philip White Guild and W.B. Wright},
  year = {1967},
  doi = {10.3133/mr51},
  url = {https://pubs.usgs.gov/publication/mr51},
  note = {Source identifier: mr51}
}