Stratigraphy of the woodfordian and altonian drifts of Central northern Illinois. - Urbana-Champaign, IL.

von Kempton, John P.
Veröffentlicht in The quaternary of Illinois ; 14.1968, S. 27-34 : 5 Ill.
1968.

The late-altonian (Wisconsinan) glacial sequence in northern Illinois. - Springfield, IL.

von Kempton, John P.
Veröffentlicht in International Association for Quaternary Research <8, Boulder-CO> : international congress ; proceedings ; 7. 1968, S. 535-546 : 3 Ill.
1968.