Federal Reserve Bank of Chicago. "March 1963," Business Conditions (Federal Reserve Bank of Chicago) (March 1963). https://fraser.stlouisfed.org/title/5562/item/540201, accessed on April 19, 2024.
Federal Reserve Bank of Chicago. "March 1963," Business Conditions (Federal Reserve Bank of Chicago) (March 1963). https://fraser.stlouisfed.org/title/5562/item/540201, accessed on April 19, 2024.