Report [with annual summary] for ... [of the] Illinois Section of the Climatological Service of the Weather Bureau.

At head of title: U.S. Department of Agriculture.

A biological and water quality survey of Sugar Creek and tributaries, Crawford County, Illinois, August-September, 1992 /

"IEPA/WPC/93-063."--Cover.

A directory of Illinois nature preserves /

Mode of access: Internet.

A directory of Illinois nature preserves /

v.1. Northeastern Illinois -- v.2. Northwestern, Central and Southern Illinois.

A Governor's conference on science and technology in Illinois : proceedings of the 15th annual ENR conference, September 3 and 4, 1986, Chicago, Illinois.

Includes bibliographies and indexes.

A primer regarding certain provisions of the Illinois groundwater protection act /

"January, 1988."

A Preliminary assessment of the increased speed limit on rural interstate highways in Illinois /

At head of title on cover: Welcome to life in Illinois.

A water quality survey of the Grand Calumet River from the Indiana State line to Burnham, Illinois : the Grand Calumet River portion of segment A-12 Des Plaines/Lake Michigan Basins, April-August, 1978.

Edited by Robert Schacht.

An intensive survey of Bear Creek in West-Central Illinois, August-September, 1992 /

"December, 1994."

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.

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.