HOUSTON, Mary. Twenty-Seventh Annual Saskatchewan Christmas Bird Count, 1968. Blue Jay, [S. l.], v. 27, n. 1, 1969. DOI: 10.29173/bluejay3608. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3608. Acesso em: 2 may. 2024.