@misc{indiciae764f9cac31f9,
  title = {The Prichard Formation of the lower part of the Belt Supergroup (Middle Proterozoic), near Plains, Sanders County, Montana},
  author = {Earle Rupert Cressman},
  year = {1985},
  doi = {10.3133/b1553},
  url = {https://pubs.usgs.gov/publication/b1553},
  note = {Source identifier: b1553}
}