@misc{indiciae6e42a816cca6,
  title = {Recent sightings and a specimen record of the Trumpeter Swan in the Willamette Valley, Oregon},
  author = {Lawrence J. Blus and Charles J. Henny and M.S. Eltzroth},
  year = {1987},
  doi = {10.2307/3535694},
  url = {https://pubs.usgs.gov/publication/5221540},
  note = {Source identifier: 5221540}
}