Singh, R. V., and K. C. Sharma. “Note on the Effect of Frequent Freshenings on Resin Yield from <I>Chil (Pinus roxburghii)< I>”;. Indian Forester 100, no. 3 (March 1, 1974): 206–208. Accessed December 26, 2025. https://indianforester.co.in/index.php/indianforester/article/view/26848.