RAJKHOWA, S.; SETH, S. K. The Effect of Periodicity, and Length and Depth of Freshening on the Yield of Resin from <I>Pinus roxburghii</I>. Indian Forester, [S. l.], v. 87, n. 12, p. 724–730, 1961. DOI: 10.36808/if/1961/v87i12/24605. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/24605. Acesso em: 4 dec. 2025.