@misc{indiciaef7fc0000999b,
  title = {Evaluation of models proposed for the 1991 revision of the International Geomagnetic Reference Field},
  author = {N.W. Peddie},
  year = {1992},
  doi = {10.5636/jgg.44.793},
  url = {https://pubs.usgs.gov/publication/70016888},
  note = {Source identifier: 70016888}
}