@misc{indiciae7f9eddf53f55,
  title = {Palynology of the upper Campanian (Cretaceous) Judith River Formation, north-central Montana},
  author = {Bernadine D. Tschudy},
  year = {1973},
  doi = {10.3133/pp770},
  url = {https://pubs.usgs.gov/publication/pp770},
  note = {Source identifier: pp770}
}