HOOPER, Donald F. Trumpeter Swans in Eastern Saskatchewan. Blue Jay, [S. l.], v. 49, n. 2, 1991. DOI: 10.29173/bluejay5182. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/5182. Acesso em: 30 apr. 2024.