Ratna Rao, A., and B. P. Singh. “Non-Wood Forest Products Contribution in Tribal Economy: (a Case Study in South Bihar and South West Bengal)”. Indian Forester 122, no. 4 (April 1, 1996): 337–342. Accessed July 10, 2025. http://indianforester.co.in/index.php/indianforester/article/view/6274.