@misc{indiciae7fcb697986db,
  title = {An appraisal of the Great Basin Middle Cambrian trilobites described before 1900},
  author = {A. R. Palmer},
  year = {1954},
  doi = {10.3133/pp264d},
  url = {https://pubs.usgs.gov/publication/pp264D},
  note = {Source identifier: pp264D}
}