The ’Northern Spy’ Apple. Journal of the American Pomological Society, [S. l.], v. 52, n. 2, p. 66–71, 1998. DOI: 10.71318/apom.1998.52.2.66. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/2302. Acesso em: 14 dec. 2025.