@misc{indiciaed4ea9c75051e,
  title = {Ordovician fossils from wells in the Williston basin, eastern Montana},
  author = {Reuben James Ross},
  year = {1957},
  doi = {10.3133/b1021m},
  url = {https://pubs.usgs.gov/publication/b1021M},
  note = {Source identifier: b1021M}
}