@misc{indiciae4d2c585d4c85,
  title = {Synopsis of new vertebrata from the Tertiary of Colorado, obtained during the summer of 1873},
  author = {E.D. Cope and Ferdinand Vandeveer Hayden},
  year = {1873},
  doi = {10.3133/70039707},
  url = {https://pubs.usgs.gov/publication/70039707},
  note = {Source identifier: 70039707}
}