KOES, Rudolf F. An early summer’s birding at Churchill, Manitoba. Blue Jay, [S. l.], v. 57, n. 3, 1999. DOI: 10.29173/bluejay5935. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/5935. Acesso em: 23 apr. 2024.