JMAEFF, Jacob H. A Gyrfalcon Observation. Blue Jay, [S. l.], v. 17, n. 2, 1959. DOI: 10.29173/bluejay2266. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2266. Acesso em: 22 nov. 2024.