HJERTAAS, D. G.; HJERTAAS, E. . The Common Raven Reoccupies Southern Saskatchewan. Blue Jay, [S. l.], v. 77, n. 4, p. 10–15, 2019. DOI: 10.29173/bluejay2134. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2134. Acesso em: 17 oct. 2021.