Tag Archives: Pennsylvanian

[071-01] Mollusca and a Trilobite from the Shumway Cyclothem, Mattoon Formation, Pennsylvanian, Illinois

Scheihing, Mark H. and Ralph L. Langenheim, Jr. Mollusca and a Trilobite from the Shumway Cyclothem, Mattoon Formation, Pennsylvanian, Illinois 071-01-print

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