Awasthi, N., J.S. Guleria, M. Prasad, and R. Srivastava. “Occurrence of Acrostichum linn., a Coastal Fern in the Tertiary Sediments of Kasauli, Himachal Pradesh, North-West Himalaya”. Journal of Palaeosciences 43, no. 1-3 (December 31, 1994): 83–87. Accessed May 2, 2024. https://jpsonline.co.in/index.php/jop/article/view/1178.