SHADICK, Stan; ROY, J. F. Annual May-Day Bird Count, Saskatoon, May 23, 1970. Blue Jay, [S. l.], v. 28, n. 4, 1970. DOI: 10.29173/bluejay3442. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3442. Acesso em: 3 may. 2024.