[042-09]Check List of the Vascular Plants of Winnebago County, Illinois
Fuller, George D, Fell, Egbert W., Fell, George B. Check List of the Vascular Plants of Winnebago County, Illinois 042-09-print
[042-04]Late Woodland Occupations of the Fisher Site, Will County, Illinois
Gillette, Charles E. Late Woodland Occupations of the Fisher Site, Will County, Illinois 042-04-print
[043-23]Preglacial Gravels in Henry County, Illinois
Horberg, Leland Preglacial Gravels in Henry County, Illinois 043-23-print
[043-03]The Ligneous Flora of Richland County, Illinois, by Robert Ridgway, an Unpublished Manuscript
Fuller, George D. The Ligneous Flora of Richland County, Illinois, by Robert Ridgway, an Unpublished Manuscript 043-03-print
[044-12]Major Aquifers in Glacial Drift near Mattoon, Illinois
Foster, John Major Aquifers in Glacial Drift near Mattoon, Illinois 044-12-print
[045-35]Caves of the Kinkaid Limestone Near Cobden, Illinois
Harris, Stanley E., Jr. and Allen, Bill Dean Caves of the Kinkaid Limestone Near Cobden, Illinois 045-35-print
[045-04]Initial Report on the Mosses of McDonough County, Illinois
Morrow, Jean S. Initial Report on the Mosses of McDonough County, Illinois 045-04-print
[046-36]Avian Populations of the Funk Forest Natural Area in McLean County, Illinois
Calef, Robert T. Avian Populations of the Funk Forest Natural Area in McLean County, Illinois 046-36-print
[046-34]Analysis of the Gizzard Shad Population of Crab Orchard Lake, Illinois
Lewis, William M. Analysis of the Gizzard Shad Population of Crab Orchard Lake, Illinois 046-34-print
[046-21]Prospecting for Commercial Sand and Gravel Using Electrical Earth Resistivity, Clinton County, Illinois
Dobrovolny, Jerry S. Prospecting for Commercial Sand and Gravel Using Electrical Earth Resistivity, Clinton County, Illinois 046-21-print