@misc{indiciae9b5debb07ffb,
  title = {Aeromagnetic map of the northwestern part of the Hibbing 1 degree x 2 degree Quadrangle, Minnesota},
  author = {Robert E. Bracken and Richard H. Godson},
  year = {1988},
  doi = {10.3133/ofr888},
  url = {https://pubs.usgs.gov/publication/ofr888},
  note = {Source identifier: ofr888}
}