HEWETSON, C. E. Ecology in Pictures. Indian Forester, [S. l.], v. 77, n. 9, p. 564–567, 1951. DOI: 10.36808/if/1951/v77i9/23315. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/23315. Acesso em: 21 aug. 2025.