MAITLAND-KIRWAN, J. D. A Method of Making Rough Estimates for Roads in Hilly Country. Indian Forester, [S. l.], v. 39, n. 10, p. 477–486, 1913. DOI: 10.36808/if/1913/v39i10/17707. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/17707. Acesso em: 19 feb. 2026.