@misc{indiciae06a7741570f9,
  title = {Aeromagnetic and geologic map of northeastern Minnesota},
  author = {G. D. Bath and G. M. Schwartz and F. P. Gilbert},
  year = {1965},
  doi = {10.3133/gp472},
  url = {https://pubs.usgs.gov/publication/gp472},
  note = {Source identifier: gp472}
}