@misc{indiciaeb383f7215c6f,
  title = {Aspen height, stem-girth and survivorship in an area of high ungulate use},
  author = {R.B. Keigley and M.R. Frisina},
  year = {2008},
  url = {https://pubs.usgs.gov/publication/70009706},
  note = {Source identifier: 70009706}
}