@misc{indiciaea3ff9befd156,
  title = {Cenozoic history of northeastern Montana and northwestern North Dakota with emphasis on the Pleistocene},
  author = {A.D. Howard},
  year = {1960},
  doi = {10.3133/pp326},
  url = {https://pubs.usgs.gov/publication/pp326},
  note = {Source identifier: pp326}
}