@misc{indiciae63078077ea51,
  title = {How the geomagnetic field vector reverses polarity},
  author = {M. Prevot and E. A. Mankinen and C. S. Grommé and R. S. Coe},
  year = {1985},
  doi = {10.1038/316230a0},
  url = {https://pubs.usgs.gov/publication/70013010},
  note = {Source identifier: 70013010}
}