@misc{indiciaed4dd79d078d8,
  title = {Aeromagnetic map of parts of Gogebic and Ontonagon Counties, Michigan},
  author = {G. R. Boynton and Joseph L. Vargo},
  year = {1964},
  doi = {10.3133/ofr6422},
  url = {https://pubs.usgs.gov/publication/ofr6422},
  note = {Source identifier: ofr6422}
}