@misc{indiciae7a75a6a6fffd,
  title = {A provisional Radiolaria biostratigraphy, Late Devonian through Late Permian},
  author = {Brian K. Holdsworth and David Lawrence Jones},
  year = {1980},
  doi = {10.3133/ofr80876},
  url = {https://pubs.usgs.gov/publication/ofr80876},
  note = {Source identifier: ofr80876}
}