KNAPTON, Richard W.     . Black-Headed Grosbeak at Pierson, Manitoba. Blue Jay, [S. l.], v. 33, n. 3, 1970. DOI: 10.29173/bluejay4223. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4223. Acesso em: 4 may. 2024.