Federal Reserve Bank of Chicago. "August 1, 1928, Volume 11, Number 8," Business Conditions (Federal Reserve Bank of Chicago) (August 1, 1928). https://fraser.stlouisfed.org/title/5562/item/574512, accessed on April 19, 2024.
Federal Reserve Bank of Chicago. "August 1, 1928, Volume 11, Number 8," Business Conditions (Federal Reserve Bank of Chicago) (August 1, 1928). https://fraser.stlouisfed.org/title/5562/item/574512, accessed on April 19, 2024.