@misc{indiciaecd847cc98b4c,
  title = {Preliminary surficial geologic map of the Iron River 1 degree by 2 degrees quadrangle, Michigan and Wisconsin},
  author = {W. L. Peterson},
  year = {1982},
  doi = {10.3133/ofr82301},
  url = {https://pubs.usgs.gov/publication/ofr82301},
  note = {Source identifier: ofr82301}
}