Variations in Growth and Productivity Among Macspur Apple Trees, and Growth Comparisons between Spur and Nonspur McIntosh and Delicious Cultivars. jpom [Internet]. 1983 Oct. 1 [cited 2025 Dec. 11];37(4):95-9. Available from: https://journal.americanpomological.org/index.php/jofaps/article/view/1511