@misc{indiciae493e21429080,
  title = {Recreational trails as corridors for alien plants in the Rocky Mountains, USA},
  author = {Floye H. Wells and William K. Lauenroth and John B. Bradford},
  year = {2012},
  doi = {10.3398/064.072.0408},
  url = {https://pubs.usgs.gov/publication/70046793},
  note = {Source identifier: 70046793}
}