@misc{indiciae8587aa6a70e1,
  title = {Aeromagnetic map of Sault Sainte Marie and vicinity, Michigan},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1979},
  doi = {10.3133/ofr79833},
  url = {https://pubs.usgs.gov/publication/ofr79833},
  note = {Source identifier: ofr79833}
}