BOR, E. C. The Indispensable Pair. Indian Forester, [S. l.], v. 65, n. 9, p. 573–579, 1939. DOI: 10.36808/if/1939/v65i9/27347. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/27347. Acesso em: 21 aug. 2025.