DE VRIES, Bernard. Nodding Trilliums in Eastern Saskatchewan. Blue Jay, [S. l.], v. 31, n. 4, 1970. DOI: 10.29173/bluejay3798. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3798. Acesso em: 3 jul. 2024.