A Principle for Maintaining Earthworms in Farm Soils. Journal of the American Pomological Society, [S. l.], v. 2, n. 3, p. 85–85, 1947. DOI: 10.71318/apom.1947.2.3.85. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/770. Acesso em: 17 feb. 2026.