@misc{indiciaee87cc5d1b431,
  title = {Wilderness permit accuracy: differences between reported and actual use},
  author = {David J. Parsons and Thomas J. Stohlgren and James M. Kraushaar},
  year = {1982},
  doi = {10.1007/bf01875064},
  url = {https://pubs.usgs.gov/publication/70120251},
  note = {Source identifier: 70120251}
}