@misc{indiciaecb56e14d357d,
  title = {Monitoring and assessing trail conditions at Acadia National Park},
  author = {Jeffrey L. Marion and Jeremy Wimpey and Logan Park},
  year = {2009},
  doi = {10.2307/j.ctv1xx9bkn.23},
  url = {https://pubs.usgs.gov/publication/70158983},
  note = {Source identifier: 70158983}
}