Geomorphology of the lower Illinois Valley as a spatial-temporal context for the Koster archaic site /

by Butzer, Karl W.
Springfield : Illinois State Museum, 1977

Quaternary history of the Sangamon River drainage system, central Illinois /

by Miller, James Andrew
Springfield, Ill. : Illinois State Museum, 1973

Early archaic projectile points and hunting patterns in the Lower Illinois Valley /

by Luchterhand, Kubet
Springfield, Ill. : State of Illinois, Department of Registration and Education, Illinois State Museum, 1970