Forest trees of Illinois;
how to know them. A pocket manual describing their most important characteristics.
APA Citation
Illinois. Division of Forestry., Illinois. Dept. of Conservation. Forest trees of Illinois: how to know them. A pocket manual describing their most important characteristics. Springfield.
MLA Citation
Illinois. Division of Forestry, and Illinois. Dept. of Conservation. Forest Trees of Illinois: How to Know Them. A Pocket Manual Describing Their Most Important Characteristics. Springfield,
Warning: These citations may not always be complete (especially for serials).