@misc{indiciaeca9fa6dfe4e7,
  title = {Geomagnetic polarity epochs and pleistocene geochronometry},
  author = {A. Cox and Richard R. Doell and G. B. Dalrymple},
  year = {1963},
  doi = {10.1038/1981049a0},
  url = {https://pubs.usgs.gov/publication/70010633},
  note = {Source identifier: 70010633}
}