@misc{indiciae1929a0df13f3,
  title = {Evaluating wilderness recreational opportunities: application of an impact matrix},
  author = {Thomas J. Stohlgren and David J. Parsons},
  year = {1992},
  doi = {10.1007/bf02400079},
  url = {https://pubs.usgs.gov/publication/70126939},
  note = {Source identifier: 70126939}
}