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Shukla, M. 1983. Biometric study of Plicatipollenites Lele and Potonieisporites Bhardwaj in the Lower Gondwana formations of the Hutar Coalfield, Bihar, India. Journal of Palaeosciences. 31, (1-3) (Dec. 1983), 30–44. DOI:https://doi.org/10.54991/jop.1983.1705.