Biodiversity Heritage Library
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By "Winslow, Marcia R."
Upper Mississippian and Pennsylvanian megaspores and other plant microfossils from Illinois /
By: Winslow, Marcia R. - Illinois State Geological Survey.
Publication info: Urbana, Ill. :Illinois State Geological Survey,1959.
Contributed by: University of Illinois Urbana Champaign