@misc{indiciaec6768adad0e3,
  title = {Nonconsumptive outdoor recreation: an annotated bibliography of human-wildlife interactions.},
  author = {Stephen A. Boyle and Fred B. Samson},
  year = {1983},
  url = {https://pubs.usgs.gov/publication/ssrw252},
  note = {Source identifier: ssrw252}
}