@misc{indiciaeb970ba504403,
  title = {Aeromagnetic map of southeastern Iron County, Michigan},
  author = {James R. Balsley and C.L. Kruger},
  year = {1965},
  doi = {10.3133/ofr6510},
  url = {https://pubs.usgs.gov/publication/ofr6510},
  note = {Source identifier: ofr6510}
}