@misc{indiciaeca08bd9eadab,
  title = {Informal trail monitoring protocols: Denali National Park and Preserve. Final Report, October 2011},
  author = {Jeffrey L. Marion and Jeremy F. Wimpey},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70040253},
  note = {Source identifier: 70040253}
}