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Author/Creator
- Illinois520
- Illinois State Geological Survey95
- Illinois. Office of the Superintendent of Public Instruction87
- Illinois. Office of Secretary of State69
- Illinois. Dept. of Public Health64
- Illinois Commerce Commission61
- Illinois State Board of Education (1973- )55
- Illinois. Environmental Protection Agency51
- Illinois. State Board of Elections48
- Illinois. Office of the Auditor General46
- Chicago Plan Commission41
- Illinois. General Assembly. Legislative Council41
- Illinois. Board of Higher Education40
- Illinois. Department of Public Health40
- Illinois. Division of Waterways37
- Bateman, Newton, 1822-189736
- Illinois. General Assembly. Legislative Council. Research Department36
- Voskuil, Walter Henry, 1892-36
- University of Illinois (Urbana-Champaign campus)35
- Harland Bartholomew & Associates34