@misc{indiciae16ad6cf652ae,
  title = {Biostratigraphic zonation of the Park City Group},
  author = {Bruce R. Wardlaw and James W. Collinson},
  year = {1977},
  doi = {10.3133/ofr77853},
  url = {https://pubs.usgs.gov/publication/ofr77853},
  note = {Source identifier: ofr77853}
}