@misc{indiciae537483b2f3f7,
  title = {Biochronology and paleoclimatic implications of Middle Eocene to Oligocene planktic foraminiferal faunas},
  author = {Gerta Keller},
  year = {1983},
  doi = {10.1016/0377-8398(83)90011-7},
  url = {https://pubs.usgs.gov/publication/70011597},
  note = {Source identifier: 70011597}
}