@misc{indiciaec9314aa200fc,
  title = {Petrified Forest National Park Invasive Plant Species Survey and Mapping; 2002-2005},
  author = {Kathryn A. Thomas and Randall J. Hunt and Terry R. Arundel and P. Guertin},
  year = {2009},
  doi = {10.3133/ofr20091179},
  url = {https://pubs.usgs.gov/publication/ofr20091179},
  note = {Source identifier: ofr20091179}
}