Ghosh, R. C., H. P. Bhatnagar, and D. P. Uniyal. “Photoperiodic Response of <I>Pinus patula< I> Schiede and Deppe Seedlings”. Indian Forester 103, no. 2 (February 1, 1977): 97–105. Accessed August 21, 2025. https://indianforester.co.in/index.php/indianforester/article/view/11630.