@misc{indiciaea96bf6e7a617,
  title = {Molluscan fauna of the Morrison formation, with a summary of the stratigraphy},
  author = {Teng-Chien Yen and John B. Reeside},
  year = {1952},
  doi = {10.3133/pp233b},
  url = {https://pubs.usgs.gov/publication/pp233B},
  note = {Source identifier: pp233B}
}