Federal Reserve Bank of Chicago. "December 1959," Business Conditions (Federal Reserve Bank of Chicago) (December 1959). https://fraser.stlouisfed.org/title/5562/item/540162, accessed on April 26, 2024.
Federal Reserve Bank of Chicago. "December 1959," Business Conditions (Federal Reserve Bank of Chicago) (December 1959). https://fraser.stlouisfed.org/title/5562/item/540162, accessed on April 26, 2024.