BARD, Fred. Co-Operative Bird Migration Study (Too late for classification). Blue Jay, [S. l.], v. 12, n. 3, 1954. DOI: 10.29173/bluejay1560. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/1560. Acesso em: 22 jul. 2024.