LAHRMAN, Fred W. Some Gyrfalcon Sightings in Saskatchewan. Blue Jay, [S. l.], v. 32, n. 3, 1970. DOI: 10.29173/bluejay4196. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4196. Acesso em: 22 jul. 2024.