RIBBLE, Barbara A.     . Ruff in Churchill, Manitoba. Blue Jay, [S. l.], v. 33, n. 3, 1970. DOI: 10.29173/bluejay4220. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4220. Acesso em: 22 jul. 2024.