@misc{indiciae4e021f2d1542,
  title = {Volume I: Fossil vertebrates, Part I: Contributions to the extinct vertebrate fauna of the western Territories},
  author = {Ferdinand Vandeveer Hayden and Joseph Leidy},
  year = {1873},
  doi = {10.3133/70038953},
  url = {https://pubs.usgs.gov/publication/70038953},
  note = {Source identifier: 70038953}
}