Federal Reserve Bank of Chicago. "August 1939, Volume 22, Number 8," Business Conditions (Federal Reserve Bank of Chicago) (August 1939). https://fraser.stlouisfed.org/title/5562/item/539919, accessed on April 25, 2024.
Federal Reserve Bank of Chicago. "August 1939, Volume 22, Number 8," Business Conditions (Federal Reserve Bank of Chicago) (August 1939). https://fraser.stlouisfed.org/title/5562/item/539919, accessed on April 25, 2024.