Kar, R.K., and K.P. Jain. 1978. “Palynology of Neogene Sediments Around Quilon and Varkala, Kerala Coast, South India - 2. Spores and Pollen Grains”. Journal of Palaeosciences 27 (1-3):113-31. https://doi.org/10.54991/jop.1978.1082.