@misc{indiciae337551e6ea9e,
  title = {Exploring visitor acceptability for hardening trails to sustain visitation and minimize impacts},
  author = {K.L. Cahill and J. L. Marion and S.R. Lawson},
  year = {2008},
  doi = {10.2167/jost804.0},
  url = {https://pubs.usgs.gov/publication/5224933},
  note = {Source identifier: 5224933}
}