Lower Des Plaines River area assessment.

Examines an area of 357.5 miles in northeast Illinois--much of which is a part of the Greater Chicago Metropolitan Region. The area includes eight subbasins, of which two have been designated a state Resource Rich Area.

Report for consultation on the Metropolitan Toledo Interstate Air Quality Control Region, Ohio - Michigan.

Mode of access: Internet.

1972 OBERS projections; regional economic activity in the United States; by economic area, water resources region and subarea, state, and SMSA and non-SMSA portions of the areas, historical and projected--1929-2020.

"Based on the SERIES 'E' projected national population, Bureau of the Census, 1972."

The economic structure of the southwestern Illinois region.

[pt.1] Introduction and methodology.--[pt.2] The past and the present.--[pt.3] The future.