@misc{indiciae4539f3e72116,
  title = {Aeromagnetic map of the Crystal Falls quadrangle and part of the Florence quadrangle, Iron County, Michigan},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1967},
  doi = {10.3133/gp607},
  url = {https://pubs.usgs.gov/publication/gp607},
  note = {Source identifier: gp607}
}