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journalAt: Oklahoma Geological Survey Circular, 32 By: Wilson L. R., Hoffmeister W. S.
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journalAt: Palaeobotanist, 1981, 30, 3 By: Lakhanpal R. N., Guleria J. S.
journalAt: Journal of the Indian Botanical Society, 26 By: Sitholey R. V.
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