SINGHAL, R. M.; SONI, S. Scanning Electron Microsccopy of Soil-humic Acids of Garhwal Himalayas. Indian Forester, [S. l.], v. 117, n. 1, p. 79–83, 1991. DOI: 10.36808/if/1991/v117i1/8572. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/8572. Acesso em: 21 aug. 2025.