@misc{indiciaea8b990ae1feb,
  title = {Stratigraphic sections of the Phosphoria formation in Montana, 1951},
  author = {James A. Peterson and R.F. Gosman and Roger Warren Swanson},
  year = {1954},
  doi = {10.3133/cir326},
  url = {https://pubs.usgs.gov/publication/cir326},
  note = {Source identifier: cir326}
}