@misc{indiciae2b55775dd103,
  title = {Ordovician brachiopods, trilobites, and stratigraphy in eastern and central Nevada},
  author = {Reuben James Ross},
  year = {1970},
  doi = {10.3133/pp639},
  url = {https://pubs.usgs.gov/publication/pp639},
  note = {Source identifier: pp639}
}