Federal Reserve Bank of Chicago. "September 30, 1930, Volume 13, Number 10," Business Conditions (Federal Reserve Bank of Chicago) (September 30, 1930). https://fraser.stlouisfed.org/title/5562/item/574537, accessed on April 28, 2024.
Federal Reserve Bank of Chicago. "September 30, 1930, Volume 13, Number 10," Business Conditions (Federal Reserve Bank of Chicago) (September 30, 1930). https://fraser.stlouisfed.org/title/5562/item/574537, accessed on April 28, 2024.