@misc{indiciae6ca1fa9cd895,
  title = {Paleocene fresh-water mollusks from southern Montana},
  author = {Teng-Chien Yen},
  year = {1948},
  doi = {10.3133/pp214c},
  url = {https://pubs.usgs.gov/publication/pp214C},
  note = {Source identifier: pp214C}
}