@misc{indiciae109cdc8120e6,
  title = {Magnetic total intensity in the United States; epoch 1980},
  author = {E.B. Fabiano and N.W. Peddie},
  year = {1981},
  doi = {10.3133/i1370},
  url = {https://pubs.usgs.gov/publication/i1370},
  note = {Source identifier: i1370}
}