Clay mineral composition, a source indication of Midwest loess. - Urbana-Champaign, IL.

von Glass, Herbert D.
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Correlation of midwestern loesses with glacial succession. - Lincoln, NB.

von Frye, John C.
Veröffentlicht in International Association for Quaternary Research <7, 1965, Boulder ; Denver> : international congress ; proceedings ; 12. 1968, S. 3-21 : 3 Ill.
1968.