@misc{indiciae6a1a5adee956,
  title = {Effects of reintroduced beaver ( Castor canadensis ) on riparian bird community structure along the upper San Pedro River, southeastern Arizona and northern Sonora, Mexico},
  author = {Glenn E. Johnson and Charles van Riper},
  year = {2014},
  doi = {10.3133/ofr20141121},
  url = {https://pubs.usgs.gov/publication/ofr20141121},
  note = {Source identifier: ofr20141121}
}