@misc{indiciae7ac8512c607c,
  title = {A half century of change in alpine treeline patterns at Glacier National Park, Montana, U.S.A.},
  author = {F.L. Klasner and D.B. Fagre},
  year = {2002},
  doi = {10.2307/1552508},
  url = {https://pubs.usgs.gov/publication/70025053},
  note = {Source identifier: 70025053}
}