SINGH, Virendra; PALIWAL, G. S. A Note on the Varlaniuty in Cone Size of Spruce. Indian Forester, [S. l.], v. 113, n. 6, p. 452–453, 1987. DOI: 10.36808/if/1987/v113i6/9413. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/9413. Acesso em: 5 dec. 2025.