Vishnu-Mittre. “Studies on the Fossil Flora of Nipania, Rajmahal Series, India - Pteridophyta, and General Observation on Nipania Fossil Flora”. Journal of Palaeosciences 7, no. (1-2) (December 31, 1958): 47–66. Accessed November 25, 2024. https://jpsonline.co.in/index.php/jop/article/view/570.