@misc{indiciae4832930e4e83,
  title = {Aeromagnetic map of northwestern Ontonagon County, Michigan},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/gp834},
  url = {https://pubs.usgs.gov/publication/gp834},
  note = {Source identifier: gp834}
}