@misc{indiciaef510beadb1e1,
  title = {Informal and formal trail monitoring protocols and baseline conditions: Acadia National Park},
  author = {Jeffrey L. Marion and Jeremy F. Wimpey and L. Park},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70005579},
  note = {Source identifier: 70005579}
}