@misc{indiciae314c5e9e5391,
  title = {A spatial exploration of informal trail networks within Great Falls Park, VA},
  author = {Jeremy Wimpey and Jeffrey L. Marion},
  year = {2011},
  doi = {10.1016/j.jenvman.2010.11.015},
  url = {https://pubs.usgs.gov/publication/70003776},
  note = {Source identifier: 70003776}
}