Forest trees of Illinois :
how to know them : a pocket manual describing their most important characteristics.

APA Citation

Illinois. Dept. of Conservation., Mattoon, W. R. (Wilbur Reed)., Miller, R. B. (Robert Barclay)., United States. Forest Service. (1937). Forest trees of Illinois: how to know them : a pocket manual describing their most important characteristics. 10th ed. Springfield, Ill.: Dept. of Conservation.

MLA Citation

Illinois. Dept. of Conservation, Wilbur R. (Wilbur Reed) Mattoon, Robert B. (Robert Barclay) Miller, and United States. Forest Service. Forest Trees of Illinois: How to Know Them : a Pocket Manual Describing Their Most Important Characteristics. 10th ed. Springfield, Ill.: Dept. of Conservation, 1937.