@misc{indiciae6431894f7d20,
  title = {Some silicified Middle Ordovician brachiopods from Kentucky},
  author = {Robert B. Neuman},
  year = {1967},
  doi = {10.3133/pp583a},
  url = {https://pubs.usgs.gov/publication/pp583A},
  note = {Source identifier: pp583A}
}