@misc{indiciae138ae1fa0fbe,
  title = {Aeromagnetic map of parts of Rockland, Watersmeet, Greenland, Ontonagon, and Iron Counties, Michigan, and Vilas and Forest Counties, Wisconsin},
  author = {P. W. Philbin and W. E. McCaslin},
  year = {1966},
  doi = {10.3133/ofr66103},
  url = {https://pubs.usgs.gov/publication/ofr66103},
  note = {Source identifier: ofr66103}
}