Winter Hardiness of Apple Varieties. Journal of the American Pomological Society, [S. l.], v. 21, n. 4, p. 78–79, 1967. DOI: 10.71318/apom.1967.21.4.78. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/885. Acesso em: 7 feb. 2026.