Sharma, K. R., Dharm Singh Meena, and Chander Lekha. “Effect of Tree Diameter and Number of Boreholes on Oleoresin Yield in Pinus Roxburghii Sargent”. Indian Forester 140, no. 9 (September 1, 2014): 875–881. Accessed July 10, 2025. http://indianforester.co.in/index.php/indianforester/article/view/52354.