HARMS, V. L. The White-Flowered Form of Nodding Thistle in Saskatchewan. Blue Jay, [S. l.], v. 36, n. 4, 1978. DOI: 10.29173/bluejay4285. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4285. Acesso em: 1 may. 2024.