@misc{indiciae836c374de048,
  title = {Annotated bibliography of graptolite references from Oklahoma, Arkansas, and adjacent areas, with a list of cited species},
  author = {Claire Carter},
  year = {1993},
  doi = {10.3133/ofr93199},
  url = {https://pubs.usgs.gov/publication/ofr93199},
  note = {Source identifier: ofr93199}
}