SASKATCHEWAN NATURAL HISTORY SOCIETY. Sixteenth Annual Sask. Christmas Bird Count, 1957. Blue Jay, [S. l.], v. 15, n. 4, 1957. DOI: 10.29173/bluejay1722. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/1722. Acesso em: 13 dec. 2025.