@misc{indiciaedc7826f43c10,
  title = {Map showing spatial and temporal relations of mountain and continental glaciations on the Northern Plains, primarily in northern Montana and northwestern North Dakota},
  author = {David S. Fullerton and Roger B. Colton and Charles A. Bush and Arthur W. Straub},
  year = {2004},
  doi = {10.3133/sim2843},
  url = {https://pubs.usgs.gov/publication/sim2843},
  note = {Source identifier: sim2843}
}