@misc{indiciaedc974afa7de3,
  title = {Computer-aided estimates of concentrating grade iron resources in the Negaunee Iron-Formation, Marquette District, Michigan},
  author = {William F. Cannon and Sandra L. Powers and Nancy A. Wright},
  year = {1976},
  doi = {10.3133/ofr76426},
  url = {https://pubs.usgs.gov/publication/ofr76426},
  note = {Source identifier: ofr76426}
}