@misc{indiciae59c92687e5fe,
  title = {Aeromagnetic map of southern Dickinson County, Michigan, and adjacent parts of Wisconsin},
  author = {James R. Balsley and Carl L. Long},
  year = {1965},
  doi = {10.3133/ofr658},
  url = {https://pubs.usgs.gov/publication/ofr658},
  note = {Source identifier: ofr658}
}