@misc{indiciae48f44a52de9e,
  title = {Devonian carrier shells (Euomphalidae) from North America and Germany},
  author = {Robert M. Linsley and Ellis Leon Yochelson},
  year = {1973},
  doi = {10.3133/pp824},
  url = {https://pubs.usgs.gov/publication/pp824},
  note = {Source identifier: pp824}
}