Champion, H. G. “An Interim Report on the Progress of Investigations into the Origin of Twisted Fibre in Pinus Longifolia Roxb”. Indian Forester 53, no. 1 (December 31, 1926): 19–22. Accessed December 27, 2025. https://indianforester.co.in/index.php/indianforester/article/view/19211.