Federal Reserve Bank of Chicago. "January 31, 1930, Volume 13, Number 2," Business Conditions (Federal Reserve Bank of Chicago) (January 31, 1930). https://fraser.stlouisfed.org/title/5562/item/574529, accessed on April 26, 2024.
Federal Reserve Bank of Chicago. "January 31, 1930, Volume 13, Number 2," Business Conditions (Federal Reserve Bank of Chicago) (January 31, 1930). https://fraser.stlouisfed.org/title/5562/item/574529, accessed on April 26, 2024.