Grape Varieties in the Pacific Northwest. Journal of the American Pomological Society, [S. l.], v. 22, n. 4, p. 68–70, 1968. DOI: 10.71318/apom.1968.22.4.68. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/944. Acesso em: 16 dec. 2025.