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

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

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

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

Economic impact study of proposed airport noise regulations, R77-4. Volume 4, economic analysis of O'Hare and Midway Airports /

Project no.: 30.017.

Economic impact of removing numerical limits on sound emissions to class C land, R76-19 /

"Project no. 30.014."

Economic impact of proposed airport noise regulations, R77-4. Volume II : economic analysis of public airports outside Chicago /

Project no. : 30.017.

Economic impact study of proposed airport noise regulations, R77-4 /

"January 1981."

Economic impact study of proposed airport noise regulations, R 77-4. Volume I : technical study of public airports outside Chicago /

"Project no. 30.017."

Laws for older adults /

"March 2010."

Limnology of Paradise Lake : June-October 1979 /

Cover title.

Limnology of Lake of Egypt : May-October 1979 /

Includes bibliographical references (p. 89-93).

Limnology of Devil's Kitchen Lake : May-October 1979 /

Bibliography: p. 89-93.

Limnology of Lake Mattoon : June-October, 1979 /

On cover: Investigations of Illinois surface waters.

Limnology of Raccoon Lake : June-October, 1979 /

Cover title.

Limnology of Stephen A. Forbes Lakes : May-October, 1979 /

Cover title.

The economic impact of proposed forging noise regulations (R76-14, -19) /

Project officer: William Murphy.