Bird Finding in Illinois

Fawks, Elton

Endangered and Disappearing Birds of the Midwest

Williams, Matt

The Birds of Illinois

Bohlen, H. David

Finding Birds in Jackson County, Illinois

DETWILER, Henry

The Drug Plants of Illinois

Tehon, Leo R.

New Acarina. Parts I and II

Ewing, H.E.

A Comparative Study of Bird Populations in Illinois, 1906-1909 and 1956-1958

Graber, Richard R.; Jean W. Graber

American Birding Association Field Guide to Birds of Illinois

Michael L. P. Retter

Vascular Plants of Illinois

Jones, George Neville; George Damon Fuller

New Records for Illinois Vascular Plants

Winterringer, Glen S.

Warblers in Your Pocket: A Guide to the Wood-Warblers of the Upper Midwest

Gardner, Dana

A Birder's Guide to the Chicago Region

Carpenter, Lynne; Greenberg, Joel