[086-13MS9307] Enigmatic Fossil Plants from the Early Pennsylvanian of Western Illinois

Richard L. Leary

Enigmatic Fossil Plants from the Early Pennsylvanian of Western Illinois

Visible Color Effects in a Positive Ray Tube Containing Helium Author: Knipp, Chas T.

The Physical History of the Upper Mississippi Valley During the Late Paleozoic Author: Van Tuyl, Francis M.

The Thebes Sandstone and Orchard Creek Shale and Their Faunas in Illinois Author: Blackwelder, Eliot

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Visible Color Effects in a Positive Ray Tube Containing Helium Author: Knipp, Chas T.

The Physical History of the Upper Mississippi Valley During the Late Paleozoic Author: Van Tuyl, Francis M.

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