Horticultural Research Institute of Ontario.—Report for 1968. Journal of the American Pomological Society, [S. l.], v. 25, n. 2, p. 47–48, 1971. DOI: 10.71318/apom.1971.25.2.47b. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1066. Acesso em: 9 feb. 2026.