@misc{indiciae011894ecdd18,
  title = {Pliocene echinoids from Okinawa},
  author = {C.W. Cooke},
  year = {1954},
  doi = {10.3133/pp264c},
  url = {https://pubs.usgs.gov/publication/pp264C},
  note = {Source identifier: pp264C}
}