@misc{indiciae6485eb879b61,
  title = {Distribution and ecology of whistling swans in the Chesapeake Bay region},
  author = {R. E. Stewart and J.H. Manning},
  year = {1958},
  doi = {10.2307/4081890},
  url = {https://pubs.usgs.gov/publication/5220113},
  note = {Source identifier: 5220113}
}