I. Physiographic divisions of the area covered by the Illinoian drift-sheet in southern Illinois. II. Recent discoveries of Pre-Illinoian drift in southern Illinois
MacClintock, Paul
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https://hdl.handle.net/2142/45010
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I. Physiographic divisions of the area covered by the Illinoian drift-sheet in southern Illinois. II. Recent discoveries of Pre-Illinoian drift in southern Illinois
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