WOOD, Kerry. Why Birds Sing ?. Indian Forester, [S. l.], v. 61, n. 2, p. 122–123, 1935. DOI: 10.36808/if/1935/v61i2/20798. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/20798. Acesso em: 15 jan. 2026.