CHOPRA, R. S. Rosin and Turpentine Industry in Punjab (India). Indian Forester, [S. l.], v. 81, n. 4, p. 252–257, 1955. DOI: 10.36808/if/1955/v81i4/23944. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/23944. Acesso em: 21 aug. 2025.