[036-38]Bedrock Surface and Thickness of Glacial Drift in Will County, Illinois
Horberg, Leland and Mason, A.C. Bedrock Surface and Thickness of Glacial Drift in Will County, Illinois 036-38-print
[043-23]Preglacial Gravels in Henry County, Illinois
Horberg, Leland Preglacial Gravels in Henry County, Illinois 043-23-print