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 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.

Analysis of charges of maladministration of the Illinois Unemployment Compensation Act made by the Chicago daily news, October and December 1950 : a report to the Board of Unemployment Compensation and Free Employment Office Advisors.

Mode of access: Internet.

An exploratory analysis of differential program costs of selected occupational curricula in selected Illinois junior colleges / Robert M. Tomlinson and Chester S. Rzonca.

Project No. RDC-A1-028.

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.