@misc{indiciae9b616c5ffd07,
  title = {Orthaulax, a Tertiary guide fossil},
  author = {C.W. Cooke},
  year = {1922},
  doi = {10.3133/pp129b},
  url = {https://pubs.usgs.gov/publication/pp129B},
  note = {Source identifier: pp129B}
}