@misc{indiciaec1dfaa6a751a,
  title = {Summary of the estimated iron resources of the Marquette and Gogebic Iron Ranges of Michigan},
  author = {William F. Cannon},
  year = {1978},
  doi = {10.3133/ofr78153},
  url = {https://pubs.usgs.gov/publication/ofr78153},
  note = {Source identifier: ofr78153}
}