Comparing density & development from different era: Chicago from the air

I viewing the Chicago pics that will blow you away I was struck w/ an idea......does anyone out there have aerial photos of the "central area" from different eras I think it would be interesting if we could see these phots juxtaposed ie 1935 aerial view of chicago vs 1940 vs 1945.....vs 1990....vs 1995 2000...2005 the intervals don;t have to be that strict but I think a place where we could bear witness to the growth of the central area as viewed from the air could be interesting>