Observation on Varieties of Pears. Journal of the American Pomological Society, [S. l.], v. 1, n. 4, p. 103–103, 1946. DOI: 10.71318/apom.1946.1.4.103. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/95. Acesso em: 23 apr. 2026.