The United States Forest Service. Indian Forester, [S. l.], v. 32, n. 2, p. 51–52, 1906. DOI: 10.36808/if/1906/v32i2/16805. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/16805. Acesso em: 20 feb. 2026.