@misc{indiciae0288b2ffb217,
  title = {Assessment of models proposed for the 1981 revision of the IGRF},
  author = {N.W. Peddie and E.B. Fabiano},
  year = {1982},
  doi = {10.5636/jgg.34.387},
  url = {https://pubs.usgs.gov/publication/70011242},
  note = {Source identifier: 70011242}
}