Depth and frequency of floods in Illinois /

Bibliography: p. 26.

Demonstration of photovoltaic power source in remote applications : lighting, weather data gathering and public demonstration systems : Wildlife Prairie Park, Peoria, Illinois.

"Printed: May 1990."

Directory of Illinois local registrars.

Description based on: August 1991; title from cover.

Digest of laws affecting Illinois highways and highway administration enacted by the ... General Assembly.

Description based on: 1965, 74th General Assembly.

Economic impact of proposed water quality and effluent standard amendments for water in the Sangamon River Basin /

"November 1986."

Effects of livestock wastes on small Illinois streams : Lower Kaskaskia River Basin and Upper Little Wabash River Basin : summer 1991 /

"July 1992."

Educational materials and programs : IDNR Division of Education.

"11/08"--Colophon.

Effects of enforcement on speeds of motorists, 11th Street, Springfield, Illinois /

On cover: Illinois traffic safety programs, report of evaluation or assessment.

Economic impact study of proposed regulation R82-7 for site-specific water pollution rules applicable to the city of Alton, Illinois /

Bibliography: p. R-1 to R-3.

Economic impact study of proposed IPCB regulation sections 215.240 and 215.207 : final report /

"Printed: June 1987."

Emissions of beryllium and mercury in Illinois /

"May 1982."

Energy conservation and utilization : a handbook for wastewater treatment plants in Illinois /

"September 1991."

Elements of forestry, with special reference to Illinois.

Mode of access: Internet.

Evaluation of underground injection of industrial waste in Illinois /

Published cooperatively by the Department of Energy and Natural Resources, Illinois State Geological Survey, Illinois State Water Survey, and Hazardous Waste Research and Information Center.

Evaluation of the Illinois highway safety construction program /

Mode of access: Internet.