Let’s Take Another Look at Hardiness. Journal of the American Pomological Society, [S. l.], v. 2, n. 4, p. 106–110, 1947. DOI: 10.71318/apom.1947.2.4.106. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/775. Acesso em: 12 mar. 2026.