Federal Reserve Bank of Chicago. "March 1965," Business Conditions (Federal Reserve Bank of Chicago) (March 1965). https://fraser.stlouisfed.org/title/5562/item/540225, accessed on April 30, 2024.
Federal Reserve Bank of Chicago. "March 1965," Business Conditions (Federal Reserve Bank of Chicago) (March 1965). https://fraser.stlouisfed.org/title/5562/item/540225, accessed on April 30, 2024.