@misc{indiciae83fcb399a37a,
  title = {Classification tree and minimum-volume ellipsoid analyses of the distribution of ponderosa pine in the western USA},
  author = {Jodi R. Norris and Stephen T. Jackson and Julio L. Betancourt},
  year = {2006},
  url = {https://pubs.usgs.gov/publication/70003893},
  note = {Source identifier: 70003893}
}