@misc{indiciae8088c23710d5,
  title = {A reexamination of the Pennsylvanian trace fossil Olivellites},
  author = {Ellis L. Yochelson and David E. Schindel},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/70162722},
  note = {Source identifier: 70162722}
}