Sources of Scionwood of Apple Cultivars, Rootstocks, and Species in Agricultural Experiment Stations of the United States and Canada. Journal of the American Pomological Society, [S. l.], v. 22, n. 2, p. 23–39, 1968. DOI: 10.71318/apom.1968.22.2.23. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/918. Acesso em: 15 jan. 2026.