Awasthi, N., Guleria, J., Prasad, M. and Srivastava, R. 1994. Occurrence of acrostichum linn., a coastal fern in the Tertiary sediments of Kasauli, Himachal Pradesh, north-west Himalaya. Journal of Palaeosciences. 43, 1-3 (Dec. 1994), 83–87. DOI:https://doi.org/10.54991/jop.1994.1178.