@misc{indiciae6a7995c9d862,
  title = {Aeromagnetic map of the Phoenix quadrangle, Keweenaw County, Michigan},
  author = {James R. Balsley and J. L. Meuschke and Jean Blanchett},
  year = {1963},
  doi = {10.3133/gp313},
  url = {https://pubs.usgs.gov/publication/gp313},
  note = {Source identifier: gp313}
}