Federal Reserve Bank of Chicago. "March 1939, Volume 22, Number 3," Business Conditions (Federal Reserve Bank of Chicago) (March 1939). https://fraser.stlouisfed.org/title/5562/item/539914, accessed on April 28, 2024.
Federal Reserve Bank of Chicago. "March 1939, Volume 22, Number 3," Business Conditions (Federal Reserve Bank of Chicago) (March 1939). https://fraser.stlouisfed.org/title/5562/item/539914, accessed on April 28, 2024.