@misc{indiciaea790362e855c,
  title = {Ostracodes from the upper part of the Sundance formation of South Dakota, Wyoming, and southern Montana},
  author = {Frederick M. Swain and James A. Peterson},
  year = {1952},
  doi = {10.3133/pp243a},
  url = {https://pubs.usgs.gov/publication/pp243A},
  note = {Source identifier: pp243A}
}