@misc{indiciae7ae476003adc,
  title = {Permian Tethyan fusulinids from California},
  author = {R. C. Douglass},
  year = {1967},
  doi = {10.3133/pp593a},
  url = {https://pubs.usgs.gov/publication/pp593A},
  note = {Source identifier: pp593A}
}