@misc{indiciae506ffec7d3a8,
  title = {Aeromagnetic map of eastern Marshall and northwestern Beltrami Counties, Minnesota},
  author = {Kenneth G. Books and G. M. Schwartz and J. L. Meuschke and W.J. Dempsey},
  year = {1958},
  doi = {10.3133/gp143},
  url = {https://pubs.usgs.gov/publication/gp143},
  note = {Source identifier: gp143}
}