@misc{indiciae6ec19a9b4abf,
  title = {Models of total magnetic intensity in the United States for 1980},
  author = {Eugene B. Fabiano and Norman W. Peddie and Audronis K. Zunde},
  year = {1987},
  doi = {10.3133/ofr87619},
  url = {https://pubs.usgs.gov/publication/ofr87619},
  note = {Source identifier: ofr87619}
}