@misc{indiciaeb4fea3f6dfc4,
  title = {Holocene Treeline Fluctuations in the Northern San Juan Mountains, Colorado, U.S.A., as Indicated by Radiocarbon-Dated Conifer Wood},
  author = {Paul E. Carrara and Deborah A. Trimble and Meyer Rubin},
  year = {1991},
  doi = {10.2307/1551601},
  url = {https://pubs.usgs.gov/publication/70209946},
  note = {Source identifier: 70209946}
}