Pyrus Species and Pear Cultivar Germ Plasm Collection in Oregon. Journal of the American Pomological Society, [S. l.], v. 25, n. 4, p. 87–89, 1971. DOI: 10.71318/apom.1971.25.4.87. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1088. Acesso em: 10 dec. 2025.