@misc{indiciae3d7a592bb9a5,
  title = {Paleoenvironmental history of the Rocky Mountain Region during the past 20,000 years},
  author = {C. Whitlock and M.A. Reasoner and C.H. Key},
  year = {2002},
  url = {https://pubs.usgs.gov/publication/70006628},
  note = {Source identifier: 70006628}
}