@misc{indiciae1c675c14ae3a,
  title = {The Middle Triassic marine invertebrate faunas of North America},
  author = {J.P. Smith},
  year = {1914},
  doi = {10.3133/pp83},
  url = {https://pubs.usgs.gov/publication/pp83},
  note = {Source identifier: pp83}
}