@misc{indiciaed90ded33aedc,
  title = {Physiography and glacial geology of eastern Montana and adjacent areas},
  author = {W. C. Alden},
  year = {1932},
  doi = {10.3133/pp174},
  url = {https://pubs.usgs.gov/publication/pp174},
  note = {Source identifier: pp174}
}