Self-Unfruitfulness of ‘Anna’ Apple. Journal of the American Pomological Society, [S. l.], v. 33, n. 2, p. 65–66, 1979. DOI: 10.71318/apom.1979.33.2.65. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1382. Acesso em: 2 feb. 2026.