Burr-Knot Observations on Clonal Apple Rootstocks in Arkansas. Journal of the American Pomological Society, [S. l.], v. 24, n. 3, p. 66–68, 1970. DOI: 10.71318/apom.1970.24.3.66. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1039. Acesso em: 29 jan. 2026.