@misc{indiciae57826c9deb7d,
  title = {Ordovician and Silurian Phi Kappa and Trail Creek formations, Pioneer Mountains, central Idaho: Stratigraphic and structural revisions, and new data on graptolite faunas},
  author = {James H. Dover and William B. N. Berry and Reuben James Ross},
  year = {1980},
  doi = {10.3133/pp1090},
  url = {https://pubs.usgs.gov/publication/pp1090},
  note = {Source identifier: pp1090}
}