Apple and Pear Costs in Michigan. Journal of the American Pomological Society, [S. l.], v. 2, n. 1, p. 29–29, 1947. DOI: 10.71318/apom.1947.2.1.29. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/731. Acesso em: 14 feb. 2026.