@misc{indiciae171c720e5386,
  title = {Latitude dependence of the angular dispersion of the geomagnetic field},
  author = {Allan Cox},
  year = {1970},
  doi = {10.1111/j.1365-246x.1970.tb06069.x},
  url = {https://pubs.usgs.gov/publication/70226470},
  note = {Source identifier: 70226470}
}