@misc{indiciae2e30aedd2064,
  title = {The 1995 revision of the joint US/UK geomagnetic field models. II: Main field},
  author = {J.M. Quinn and R.J. Coleman and S. Macmillan and D.R. Barraclough},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/70019203},
  note = {Source identifier: 70019203}
}