GHOSH, R. C.; SINGHAL, R. M.; PATHAK, T. C. Comparative Determination of the Spectral Properties and Colloidal Behaviour of Humic Acids of Sal Forest Soils of Doon Valley Planted with <I>Eucalyptus</I>. Indian Forester, [S. l.], v. 103, n. 11, p. 701–707, 1977. DOI: 10.36808/if/1977/v103i11/11821. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/11821. Acesso em: 4 dec. 2025.