GOLLOP, J.B. White Ring-Billed Gull at Saskatoon. Blue Jay, [S. l.], v. 35, n. 3, 1970. DOI: 10.29173/bluejay4267. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4267. Acesso em: 3 may. 2024.