@misc{indiciaeda8c31f8958e,
  title = {The influence of sampling interval on the accuracy of trail impact assessment},
  author = {Y.-F. Leung and J. L. Marion},
  year = {1999},
  doi = {10.1016/s0169-2046(98)00110-8},
  url = {https://pubs.usgs.gov/publication/5223841},
  note = {Source identifier: 5223841}
}