Apple Rootstocks for Colder Climates. Journal of the American Pomological Society, [S. l.], v. 28, n. 1, p. 9–11, 1974. DOI: 10.71318/apom.1974.28.1.9. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1174. Acesso em: 5 feb. 2026.