Prasad, M.N.V., and Shaila Chandra. “Palaeospiroxylon - A New Gymnospermous Wood from Raniganj Coalfield, India”. Journal of Palaeosciences 26, no. (1-3) (December 31, 1980): 230–236. Accessed May 27, 2024. https://www.jpsonline.co.in/index.php/jop/article/view/1434.