FYFE, R. W. Cliff Dwelling Sparrow Hawks in Southern Sask. Blue Jay, [S. l.], v. 16, n. 4, 1958. DOI: 10.29173/bluejay2524. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2524. Acesso em: 5 may. 2024.