Federal Reserve Bank of Chicago. "December 1, 1940, Volume 23, Number 11," Business Conditions (Federal Reserve Bank of Chicago) (December 1, 1940). https://fraser.stlouisfed.org/title/5562/item/539934, accessed on March 28, 2024.
Federal Reserve Bank of Chicago. "December 1, 1940, Volume 23, Number 11," Business Conditions (Federal Reserve Bank of Chicago) (December 1, 1940). https://fraser.stlouisfed.org/title/5562/item/539934, accessed on March 28, 2024.