HOUSTON, M. I. 39th Annual Saskatchewan Christmas Bird Count – 1980. Blue Jay, [S. l.], v. 39, n. 1, 1981. DOI: 10.29173/bluejay4587. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4587. Acesso em: 22 jul. 2024.