SASKATCHEWAN NATURAL HISTORY SOCIETY. Announcement: Hours and the Birds, by Robert D. Symons. Blue Jay, [S. l.], v. 25, n. 3, 1967. DOI: 10.29173/bluejay3377. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3377. Acesso em: 13 dec. 2025.