@misc{indiciae3857aca0ea6f,
  title = {International geomagnetic reference field 1980: a report by IAGA Division I working group.},
  author = {N.W. Peddie},
  year = {1982},
  doi = {10.1111/j.1365-246x.1982.tb06974.x},
  url = {https://pubs.usgs.gov/publication/70011876},
  note = {Source identifier: 70011876}
}