Illinois EPA policy & procedure manual.

Loose-leaf for updating.

Illinois EPA's quick answer directory.

Description based on: June 1996; title from cover.

Illinois EPA's quick answer directory.

Cover title.

Illinois environmental education resource guide : west central region /

"Fall 2000."

Illinois EPA sludge regulation guidance document.

"Authors: James J. Janssen and S. Alan Keller." -- Bibliographic data sheet.

Illinois history.

Latest issue consulted: Vol. 52, no. 2 (Feb. 1999).

Illinois integrated water quality report and section 303(d) list ... : water resource assessment information and listing of impaired waters.

Mode of access: Internet.

Illinois Landsat feasibility study /

Prepared for the Institute of Natural Resources by John Bishop in cooperation with the Dept. of Local Government Affairs and Illinois Environmental Protection Agency.

Illinois main street matters /

Illinois main street matters is a publication of the Illinois Department of Commerce and Community Affairs' Illinois Main Street Program. Illinois Main Street is a preservation-based, downtown revitalization program in cooperation with the Illinois Historic Preservation Agency.

Illinois preservation series /

Title from caption.

Illinois reasonable further progress report for 1985 : ozone and carbon monoxide.

"September, 1986."

Illinois recommended standards for sewage works /

Effective March 31, l980.

Illinois reasonable further progress report for 1986 : ozone and carbon monoxide.

"September, 1987."

Illinois state implementation plan for air pollution control : 1982 plan revision for ozone and carbon monoxide.

A revision of vol. 5 of the 1979 plan.

Illinois water quality report /

Mode of access: Internet.