Sarkar, S., Bhattacharya, A. and Singh, H. 1993. Palynology of middle siwalik sediments (late miocene) from Bagh Rao, Uttar Pradesh. Journal of Palaeosciences. 42, 1-3 (Dec. 1993), 199–209. DOI:https://doi.org/10.54991/jop.1993.1147.