BURGESS, Harold H. Significant Observations of Trumpeter Swans in Saskatchewan. Blue Jay, [S. l.], v. 55, n. 1, 1997. DOI: 10.29173/bluejay5382. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/5382. Acesso em: 28 mar. 2024.