SINGH, Puran. On Indian Oak Barks as Materials for the Manufacture of Tannin Extracts. Indian Forester, [S. l.], v. 39, n. 9, p. 421–423, 1913. DOI: 10.36808/if/1913/v39i9/17689. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/17689. Acesso em: 5 dec. 2025.