@misc{indiciae7ca9c1a7e4f4,
  title = {Assessing and Understanding Trail Degradation: Results from Big South Fork National River and Recreational Area},
  author = {J. L. Marion and N. Olive},
  year = {2006},
  doi = {10.3133/5200309},
  url = {https://pubs.usgs.gov/publication/5200309},
  note = {Source identifier: 5200309}
}