@misc{indiciae7c3309272941,
  title = {Aeromagnetic map of northeastern Iron County, Michigan},
  author = {James R. Balsley and C.L. Kruger},
  year = {1965},
  doi = {10.3133/ofr6512},
  url = {https://pubs.usgs.gov/publication/ofr6512},
  note = {Source identifier: ofr6512}
}