Illinois River Bluffs area assessment /
Illinois Department of Natural Resources, Office of Scientific Research and Analysis, [and the] State Geological Survey Division.

APA Citation

Illinois. Dept. of Natural Resources. Office of Scientific Research and Analysis., Illinois State Geological Survey., Critical Trends Assessment Project., Illinois. Dept. of Natural Resources. (1998). Illinois River Bluffs area assessment. Springfield, Ill.: Illinois Dept. of Natural Resources.

MLA Citation

Illinois. Dept. of Natural Resources. Office of Scientific Research and Analysis, Illinois State Geological Survey, Critical Trends Assessment Project, and Illinois. Dept. of Natural Resources. Illinois River Bluffs Area Assessment. Springfield, Ill.: Illinois Dept. of Natural Resources, 1998.