A Study of the Middle Pennsylvanian Flora Found in Kansas Coal Balls Collection, Kansas Collection, RH MS 1259, Kenneth Spencer Research Library, University of Kansas Libraries
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A Study of the Middle Pennsylvanian Flora Found in Kansas Coal Balls Collection, Kansas Collection, RH MS 1259, Kenneth Spencer Research Library, University of Kansas Libraries https://archives.lib.ku.edu/repositories/3/resources/2357 Accessed December 24, 2025.
