@misc{indiciaea7ee905f4254,
  title = {Trail degradation as influenced by environmental factors: A state-of-the-knowledge review},
  author = {Y.-F. Leung and J. L. Marion},
  year = {1996},
  url = {https://pubs.usgs.gov/publication/5223256},
  note = {Source identifier: 5223256}
}