Federal Reserve Bank of Chicago. "November 1939, Volume 22, Number 11," Business Conditions (Federal Reserve Bank of Chicago) (November 1939). https://fraser.stlouisfed.org/title/5562/item/539922, accessed on April 19, 2024.
Federal Reserve Bank of Chicago. "November 1939, Volume 22, Number 11," Business Conditions (Federal Reserve Bank of Chicago) (November 1939). https://fraser.stlouisfed.org/title/5562/item/539922, accessed on April 19, 2024.