References
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- Habib , Daniel . 1968 . Spore and pollen paleoecology of the Redstone seam (Upper Pennsylvanian) of West Virginia . Micropaleontology. , 14 : 199 – 220 .
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- Wilson , L. R. 1962 . Permian plant microfossils from the Flowerpot Formation, Greer County, Oklahoma . Okla. Geol. Surv. Circ. , 49 : 1 – 50 .
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