@misc{indiciae5d3d76545277,
  title = {American Upper Cretaceous Echinoidea},
  author = {C.W. Cooke},
  year = {1953},
  doi = {10.3133/pp254a},
  url = {https://pubs.usgs.gov/publication/pp254A},
  note = {Source identifier: pp254A}
}