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

"July, 1993."

An overview of legislation in the 1978 session [of the Illinois General Assembly /

Mode of access: Internet.

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.

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.

An introduction to leaking underground storage tanks in Illinois.

"Fall 1994."

An analysis of the low emission vehicle program in Illinois /

Cover title.

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

"IEPA/WPC/84-003."

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

Bibliography: p. 35.

An investigation of volatile organic chemical contramination in groundwater new Rockton, Illinois /

"March 1988."

Annual environmental conditions report ... /

Title from cover.

Annual report /

Title from cover.

Aquifers of Illinois : underground sources of drinking water and non-drinking water /

"September, 1981."

Assessment of nonpoint source impacts on Illinois water quality.

"IEPA/WPC/88-020."

Availability of legal research materials in Illinois State Library, Supreme Court Library, and Legislative Reference Bureau /

At head of title: Legal research materials.