Federal Reserve Bank of Chicago. "September 30, 1931, Volume 14, Number 10," Business Conditions (Federal Reserve Bank of Chicago) (September 30, 1931). https://fraser.stlouisfed.org/title/5562/item/539824, accessed on April 28, 2024.
Federal Reserve Bank of Chicago. "September 30, 1931, Volume 14, Number 10," Business Conditions (Federal Reserve Bank of Chicago) (September 30, 1931). https://fraser.stlouisfed.org/title/5562/item/539824, accessed on April 28, 2024.