@misc{indiciae903d4bd6543c,
  title = {Altithermal timberline advance in Western United States},
  author = {Valmore C. LaMarche and H. A. Mooney},
  year = {1967},
  doi = {10.1038/213980a0},
  url = {https://pubs.usgs.gov/publication/70011609},
  note = {Source identifier: 70011609}
}