Estimates of the population of Illinois counties and metropolitan areas, July 1, 1981, to 1985. - United States. Bureau of the Census ([Washington, D.C.] : U.S. Dept. of Commerce, Bureau of the Census : [For sale by the Supt. of Docs., U.S. G.P.O.], 1987)
Mode of access: Internet.
Keywords: Illinois -- Population -- Statistics