A Comparison of the Growth and Fruiting of McIntosh and MacSpur Apple Trees. Journal of the American Pomological Society, [S. l.], v. 35, n. 4, p. 131–133, 1981. DOI: 10.71318/apom.1981.35.4.131. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1467. Acesso em: 3 may. 2026.