Federal Reserve Bank of Chicago. "August 1960," Business Conditions (Federal Reserve Bank of Chicago) (August 1960). https://fraser.stlouisfed.org/title/5562/item/540170, accessed on April 17, 2024.
Federal Reserve Bank of Chicago. "August 1960," Business Conditions (Federal Reserve Bank of Chicago) (August 1960). https://fraser.stlouisfed.org/title/5562/item/540170, accessed on April 17, 2024.