Federal Reserve Bank of Chicago. "February 1939, Volume 22, Number 2," Business Conditions (Federal Reserve Bank of Chicago) (February 1939). https://fraser.stlouisfed.org/title/5562/item/539913, accessed on March 29, 2024.
Federal Reserve Bank of Chicago. "February 1939, Volume 22, Number 2," Business Conditions (Federal Reserve Bank of Chicago) (February 1939). https://fraser.stlouisfed.org/title/5562/item/539913, accessed on March 29, 2024.