@misc{indiciaefd0d9f2e8e74,
  title = {Aeromagnetic map of parts of Pennington, Red Lake, Beltrami, Clearwater, and Polk Counties, Minnesota},
  author = {Kenneth G. Books and G. M. Schwartz and J. L. Meuschke and W.J. Dempsey},
  year = {1958},
  doi = {10.3133/gp146},
  url = {https://pubs.usgs.gov/publication/gp146},
  note = {Source identifier: gp146}
}