SMYTHIES, A. Improved Systems of Revenue Tickets. Indian Forester, [S. l.], v. 16, n. 1-3, p. 65–68, DOI: 10.36808/if/1890/v16i1-3/14552. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/14552. Acesso em: 19 feb. 2026.