Some Thoughts on the Origin of Certain Spur-Type Mutations of Apple in the State of Washington. Journal of the American Pomological Society, [S. l.], v. 23, n. 3, p. 56–57, 1969. DOI: 10.71318/apom.1969.23.3.56. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/976. Acesso em: 19 apr. 2026.