Forest trees of Illinois :
how to know them : a pocket manual describing their most important characteristics /
by Wilbur R. Mattoon and R. B. Miller in co-operation with the Forest Service, United States Departmet of Agriculture.

APA Citation

Mattoon, W. R. (Wilbur Reed)., Miller, R. B. (Robert Barclay)., United States. Forest Service., Illinois. Dept. of Conservation. (1928). Forest trees of Illinois: how to know them : a pocket manual describing their most important characteristics. 3rd ed. Springfield, Ill.: [s. n.].

MLA Citation

Mattoon, Wilbur R. (Wilbur Reed), 1875-1941, Robert B. (Robert Barclay) Miller, United States. Forest Service, and Illinois. Dept. of Conservation. Forest Trees of Illinois: How to Know Them : a Pocket Manual Describing Their Most Important Characteristics. 3rd ed. Springfield, Ill.: [s. n.], 1928.