Biodiversity Heritage Library
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 Library, University of Illinois Urbana Champaign