@misc{indiciaeecb13215d810,
  title = {The classification and character of the Belt series in northwestern Montana},
  author = {Clyde Polhemus Ross},
  year = {1959},
  doi = {10.3133/ofr59103},
  url = {https://pubs.usgs.gov/publication/ofr59103},
  note = {Source identifier: ofr59103}
}