Variations in Growth and Productivity Among Macspur Apple Trees, and Growth Comparisons between Spur and Nonspur McIntosh and Delicious Cultivars. Journal of the American Pomological Society, [S. l.], v. 37, n. 4, p. 95–99, 1983. DOI: 10.71318/apom.1983.37.4.95. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1511. Acesso em: 11 dec. 2025.