Trees of 200-Year Old Newtown Apple Cultivar Found Free of Commonly-Occurring Viruses. Journal of the American Pomological Society, [S. l.], v. 24, n. 3, p. 56–57, 1970. DOI: 10.71318/apom.1970.24.3.56. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1037. Acesso em: 13 feb. 2026.