Federal Reserve Bank of Chicago. "April 1, 1918," Business Conditions (Federal Reserve Bank of Chicago) (April 1, 1918). https://fraser.stlouisfed.org/title/5562/item/574389, accessed on April 26, 2024.
Federal Reserve Bank of Chicago. "April 1, 1918," Business Conditions (Federal Reserve Bank of Chicago) (April 1, 1918). https://fraser.stlouisfed.org/title/5562/item/574389, accessed on April 26, 2024.