@misc{indiciae5ea9f2b68be7,
  title = {Pliocene geomagnetic polarity epochs},
  author = {G. B. Dalrymple and A. Cox and Richard R. Doell and C. S. Grommé},
  year = {1967},
  doi = {10.1016/0012-821x(67)90122-7},
  url = {https://pubs.usgs.gov/publication/70010567},
  note = {Source identifier: 70010567}
}