[056-01]Presidential Address Problems of Interpreting the Bedrock Surface of Illinois
Frye, John C. Presidential Address Problems of Interpreting the Bedrock Surface of Illinois 056-1-print
[057-02]Record of Mississippi River Diversion in the Morton Loess of Illinois
Glass, H.D., Frye, John C., and Willman, H.B. Record of Mississippi River Diversion in the Morton Loess of Illinois 057-02-print