Illinois state parks, memorials and conservation areas :
an illustrated, descriptive guide to scenic parks, historic memorials and Lincoln shrines in Illinois.
APA Citation
Illinois. Dept. of Conservation. (1958). Illinois state parks, memorials and conservation areas: an illustrated, descriptive guide to scenic parks, historic memorials and Lincoln shrines in Illinois. 6th ed. Springfield, Ill.: State of Illinois, Dept. of Conservation, Division of Parks and Memorials.
MLA Citation
Illinois. Dept. of Conservation. Illinois State Parks, Memorials And Conservation Areas: an Illustrated, Descriptive Guide to Scenic Parks, Historic Memorials And Lincoln Shrines In Illinois. 6th ed. Springfield, Ill.: State of Illinois, Dept. of Conservation, Division of Parks and Memorials, 1958.
Warning: These citations may not always be complete (especially for serials).