Hardiness in Apple Rootstocks. Journal of the American Pomological Society, [S. l.], v. 13, n. 4, p. 58–58, 1959. DOI: 10.71318/apom.1959.13.4.58. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/311. Acesso em: 14 dec. 2025.