@misc{indiciae5a4415fe6e2c,
  title = {Aeromagnetic map of the Chassell quadrangle, Houghton County, Michigan},
  author = {James R. Balsley and J. L. Meuschke and Jean Blanchett},
  year = {1963},
  doi = {10.3133/gp324},
  url = {https://pubs.usgs.gov/publication/gp324},
  note = {Source identifier: gp324}
}