Federal Reserve Bank of Chicago. "February 1, 1928, Volume 11, Number 2," Business Conditions (Federal Reserve Bank of Chicago) (February 1, 1928). https://fraser.stlouisfed.org/title/5562/item/574506, accessed on April 25, 2024.
Federal Reserve Bank of Chicago. "February 1, 1928, Volume 11, Number 2," Business Conditions (Federal Reserve Bank of Chicago) (February 1, 1928). https://fraser.stlouisfed.org/title/5562/item/574506, accessed on April 25, 2024.