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You searched for: Creator Chicago Regional Planning Association Remove constraint Creator: Chicago Regional Planning Association Date Created 1932 Remove constraint Date Created: 1932 State deposited Remove constraint State: deposited

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  • Region of Chicago--Indiana section : truck traffic in 24 hours on a typical week-day during August, 1931
  • Region of Chicago--Indiana section : highway traffic in 24 hours on a typical week-day during August, 1931