@misc{indiciae9c9662fa0811,
  title = {A catalogue of the Cretaceous and Tertiary plants of North America},
  author = {Frank Hall Knowlton},
  year = {1898},
  doi = {10.3133/b152},
  url = {https://pubs.usgs.gov/publication/b152},
  note = {Source identifier: b152}
}