Federal Reserve Bank of Chicago. "August 1956," Business Conditions (Federal Reserve Bank of Chicago) (August 1956). https://fraser.stlouisfed.org/title/5562/item/540122, accessed on May 2, 2024.
Federal Reserve Bank of Chicago. "August 1956," Business Conditions (Federal Reserve Bank of Chicago) (August 1956). https://fraser.stlouisfed.org/title/5562/item/540122, accessed on May 2, 2024.