Principles of Horticulture. Journal of the American Pomological Society, [S. l.], v. 13, n. 3, p. 47–47, 1959. DOI: 10.71318/apom.1959.13.3.47c. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/297. Acesso em: 5 feb. 2026.