Federal Reserve Bank of Chicago. "January 1, 1927, Volume 10, Number 1," Business Conditions (Federal Reserve Bank of Chicago) (January 1, 1927). https://fraser.stlouisfed.org/title/5562/item/574493, accessed on March 28, 2024.
Federal Reserve Bank of Chicago. "January 1, 1927, Volume 10, Number 1," Business Conditions (Federal Reserve Bank of Chicago) (January 1, 1927). https://fraser.stlouisfed.org/title/5562/item/574493, accessed on March 28, 2024.