FOLKER, R. V. An Observation of the Western Race of the Gray-Crowned Rosy Finch. Blue Jay, [S. l.], v. 22, n. 1, 1964. DOI: 10.29173/bluejay2794. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2794. Acesso em: 7 may. 2024.