An intensive survey of Shawnee National Forest region streams of southern Illinois, 1986-1987 /

"IEPA/WPC/90-171."--Cover.

An intensive survey of the Eagle Creek Basin, Saline and Gallatin Counties, Illinois : 1986-1987 /

"March 1988."--Cover.

An intensive survey of the Sugar Creek Basin, Crawford County, Illinois, 1986 /

"IEPA/WPC/88-030."--Cover.

An intensive survey of Otter Creek, Jersey County, Illinois, July, 1992 /

"July, 1993."

An Intensive survey of the DesPlaines River Basin from the Wisconsin state line to Joliet, Illinois, 1983-1984 : staff report /

"February 1988"--Cover.

Ameren Illinois Power Company workforce adequacy analysis report /

"December 2008"--Colophon.

Ameren Central Illinois Light Company workforce adequacy analysis report /

"December 2008"--Colophon.

Ameren Central Illinois Public Service Company workforce adequacy analysis report /

"December 2008"--Colophon.

An intensive survey of the Fox River Basin from the Wisconsin State line to Ottawa, Illinois, 1982 /

Survey made cooperatively by the Illinois Environmental Protection Agency and the Illinois Dept. of Conservation.

Analysis of investment fee savings and transition costs due to potential consolidation into Illinois Public Employees Retirement System (ILPERS) /

"May 2009"

An intensive survey of Illinois River and its tributaries : a comparison study of 1967 and 1978 stream conditions /

Chiefly tables.

An intensive survey of the Vermilion River basin, Illinois River drainage, summer 1990 /

"IEPA/WPC/93-192."--Cover.

Analysis of septic tank distribution and septage generation rates in Illinois /

"IEPA/WPC/84-003."

An analytical history of state regulation of gas and electric utilities in Illinois /

Caption title.

An intensive water quality survey of the Rock River from Rockford to Byron, Illinois, May-October, 1978 /

Bibliography: p. 35.