NIEMAN, D. J.; GODWIN, J. K.; SMITH, J. R. Whistling Swans Breeding in Saskatchewan Parkland. Blue Jay, [S. l.], v. 41, n. 2, 1983. DOI: 10.29173/bluejay4483. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4483. Acesso em: 16 may. 2024.