@misc{indiciae3066a39331da,
  title = {Pulses of middle Eocene to earliest Oligocene climatic deterioration in Southern California and the Gulf Coast},
  author = {Norman O. Frederiksen},
  year = {1991},
  doi = {10.2307/3514919},
  url = {https://pubs.usgs.gov/publication/70016386},
  note = {Source identifier: 70016386}
}