Where can you find pictures of Chicago neighborhoods circa 1930s?

The Realtors Koenig & Strey have been using pictures of Chicago neighborhoods as part of their latest advertising campaign. All the photos they have used are copyrighted by the Chicago Historical Society. They would probably be your best resource. http://memory.loc.gov/ammem/ndlpcoop/ichihtml/ The above site is really helpful. It has tons of photos from Chicago's neighborhoods and others. Check it out. Good Luck... Damian Plaza