. An Early Pennsylvanian flora with megalopteris and noeggerathiales from west-central Illinois. Paleobotany; Paleobotany; Megaloptera; Flora (biologie); Fossielen. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Leary, Richard L; Pfefferkorn, H. W. , joint author; Illinois State Museum. Urbana : Illinois State Geological Survey

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Keywords: ., bookauthorillinoisstatemuseum, bookcentury1900, booksubjectpaleo