KRIVDA, Walter V. Sulphur Butterflies at the Pas, Manitoba. Blue Jay, [S. l.], v. 25, n. 3, 1967. DOI: 10.29173/bluejay3368. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3368. Acesso em: 3 may. 2024.