Steel Sleepers. Indian Forester, [S. l.], v. 58, n. 1, p. 51–52, 1931. DOI: 10.36808/if/1932/v58i1/20065. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/20065. Acesso em: 29 oct. 2025.