@misc{indiciae2942018dae67,
  title = {Vegetation alteration along trails in Shenandoah National Park, Virginia},
  author = {Christine N. Hall and Fred R. Kuss},
  year = {1989},
  doi = {10.1016/0006-3207(89)90119-5},
  url = {https://pubs.usgs.gov/publication/70198925},
  note = {Source identifier: 70198925}
}