Federal Reserve Bank of Chicago. "April 28, 1938, Volume 21, Number 4," Business Conditions (Federal Reserve Bank of Chicago) (April 28, 1938). https://fraser.stlouisfed.org/title/5562/item/539903, accessed on April 25, 2024.
Federal Reserve Bank of Chicago. "April 28, 1938, Volume 21, Number 4," Business Conditions (Federal Reserve Bank of Chicago) (April 28, 1938). https://fraser.stlouisfed.org/title/5562/item/539903, accessed on April 25, 2024.