ROY, J.F. Annual May-Day Bird Count, Saskatoon. Blue Jay, [S. l.], v. 27, n. 4, 1969. DOI: 10.29173/bluejay3414. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3414. Acesso em: 22 nov. 2024.