The USDA Pear Breeding Program I. Emasculation and Pollination. Journal of the American Pomological Society, [S. l.], v. 31, n. 4, p. 78–82, 1977. DOI: 10.71318/apom.1977.31.4.78. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1345. Acesso em: 2 feb. 2026.