@misc{indiciaef94cbb2f3f4e,
  title = {Affinities of late Eocene spores and pollen grains from southeastern North America},
  author = {Norman O. Frederiksen},
  year = {1977},
  doi = {10.3133/ofr77691},
  url = {https://pubs.usgs.gov/publication/ofr77691},
  note = {Source identifier: ofr77691}
}