@misc{indiciae6a5f102a2cc6,
  title = {Glyptagnostus and associated trilobites in the United States},
  author = {Allison R. Palmer},
  year = {1962},
  doi = {10.3133/pp374f},
  url = {https://pubs.usgs.gov/publication/pp374F},
  note = {Source identifier: pp374F}
}