@misc{indiciae89dd7152b3d4,
  title = {Aeromagnetic map of the Bergland and part of the White Pine quadrangles, Ontonagon and Gogebic Counties, Michigan},
  author = {James R. Balsley and Joseph L. Vargo},
  year = {1964},
  doi = {10.3133/ofr648},
  url = {https://pubs.usgs.gov/publication/ofr648},
  note = {Source identifier: ofr648}
}