Author/Creator
- Illinois184
- Illinois. Dept. of Public Health25
- Illinois. Department of Public Health15
- Illinois. Office of Secretary of State15
- Illinois Commerce Commission14
- United States10
- Illinois. Environmental Protection Agency7
- Illinois. General Assembly. Legislative Council7
- Illinois Economic and Fiscal Commission6
- Illinois State Board of Education (1973- )6
- Illinois. Department of Registration and Education6
- Illinois. General Assembly. Legislative Investigating Commission6
- United States. Congress. House. Committee on Rivers and Harbors6
- United States. Congress. Senate. Committee on Public Buildings and Grounds6
- Illinois. Division of Fire Prevention5
- Illinois. Division of Water Resources5
- Illinois. General Assembly. Legislative Council. Research Department5
- United States. Congress. House. Committee on Resources. Subcommittee on National Parks, Recreation, and Public Lands5
- Chicago (Ill.)4
- Huff, Linda L.4