@misc{indiciaea269d0a46433,
  title = {Aeromagnetic map of the eastern Northern Peninsula of Michigan},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1980},
  doi = {10.3133/ofr80149},
  url = {https://pubs.usgs.gov/publication/ofr80149},
  note = {Source identifier: ofr80149}
}