PEARSON, R. S. The Supply of Railway Sleepers in India. Indian Forester, [S. l.], v. 39, n. 4, p. 170–173, 1913. DOI: 10.36808/if/1913/v39i4/17631. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/17631. Acesso em: 28 oct. 2025.