Federal Reserve Bank of Chicago. "January 1939, Volume 22, Number 1," Business Conditions (Federal Reserve Bank of Chicago) (January 1939). https://fraser.stlouisfed.org/title/5562/item/539912, accessed on March 28, 2024.
Federal Reserve Bank of Chicago. "January 1939, Volume 22, Number 1," Business Conditions (Federal Reserve Bank of Chicago) (January 1939). https://fraser.stlouisfed.org/title/5562/item/539912, accessed on March 28, 2024.