@misc{indiciae20ea2f1554cd,
  title = {Fordilla troyensis Barrande: The oldest known pelecypod},
  author = {J. Pojeta and B. Runnegar and J. Kriz},
  year = {1973},
  doi = {10.1126/science.180.4088.866},
  url = {https://pubs.usgs.gov/publication/70011078},
  note = {Source identifier: 70011078}
}