@misc{indiciae6f887a21abc9,
  title = {The 2000 revision of the joint UK/US geomagnetic field models and an IGRF 2000 candidate model},
  author = {S. Macmillan and J.M. Quinn},
  year = {2014},
  doi = {10.1186/bf03352345},
  url = {https://pubs.usgs.gov/publication/70022403},
  note = {Source identifier: 70022403}
}