SONI, R. C. International Union for Conservation of Nature and Natural Resources. Indian Forester, [S. l.], v. 95, n. 11, p. 704–705, 1969. DOI: 10.36808/if/1969/v95i11/26178. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/26178. Acesso em: 4 dec. 2025.