Federal Reserve Bank of Chicago. "July 31, 1931, Volume 14, Number 8," Business Conditions (Federal Reserve Bank of Chicago) (July 31, 1931). https://fraser.stlouisfed.org/title/5562/item/539822, accessed on April 26, 2024.
Federal Reserve Bank of Chicago. "July 31, 1931, Volume 14, Number 8," Business Conditions (Federal Reserve Bank of Chicago) (July 31, 1931). https://fraser.stlouisfed.org/title/5562/item/539822, accessed on April 26, 2024.