@misc{indiciaeb4fd4c377f7a,
  title = {Aeromagnetic map of the McGregor Lake-Tally Lake area, Flathead and Lincoln Counties, Montana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/gp684},
  url = {https://pubs.usgs.gov/publication/gp684},
  note = {Source identifier: gp684}
}