@misc{indiciae1b8d82641411,
  title = {Vascular Plant and Vertebrate Inventory of Saguaro National Park, Tucson Mountain District},
  author = {William L. Halvorson and Cecilia A. Schmidt and Brian F. Powell},
  year = {2007},
  doi = {10.3133/ofr20071296},
  url = {https://pubs.usgs.gov/publication/ofr20071296},
  note = {Source identifier: ofr20071296}
}