@misc{indiciae30e5b9c67d7b,
  title = {Extent and control of resource damage due to noncompliant visitor behavior: A case study from the U.S. National Parks},
  author = {Darryll R. Johnson and Mark E. Vande Kamp},
  year = {1996},
  url = {https://pubs.usgs.gov/publication/70240679},
  note = {Source identifier: 70240679}
}