Inventory of resource rich areas in Illinois : an evaluation of ecological resources /

"IDNR/EEA-96/08"--T.p. verso.

The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project.

"June 1994."

Vermilion River (Illinois River Basin) area assessment.

The Critical Trends Assessment Program (CTAP) documents changes in ecological conditions.

Bioindicators for assessing ecological integrity of prairie wetlands /

"July 1996."