@misc{indiciae58edd74fa552,
  title = {A catalogue of the Mesozoic and Cenozoic plants of North America},
  author = {Frank Hall Knowlton},
  year = {1919},
  doi = {10.3133/b696},
  url = {https://pubs.usgs.gov/publication/b696},
  note = {Source identifier: b696}
}