SEN, J. Refining of Crude Katha. Indian Forester, [S. l.], v. 53, n. 6, p. 340–342, 1927. DOI: 10.36808/if/1927/v53i6/19125. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/19125. Acesso em: 4 dec. 2025.