@misc{indiciae7ca472ec9787,
  title = {Aeromagnetic map of the Kabetogama Lake-Grassy Lake area, St. Louis County, Minnesota},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1968},
  doi = {10.3133/gp616},
  url = {https://pubs.usgs.gov/publication/gp616},
  note = {Source identifier: gp616}
}