@misc{indiciae31a0158b31e7,
  title = {Low intensity of the geomagnetic field in early Jurassic time},
  author = {M. Perrin and M. Prevot and E. A. Mankinen},
  year = {2012},
  doi = {10.1029/91jb00871},
  url = {https://pubs.usgs.gov/publication/70016532},
  note = {Source identifier: 70016532}
}