Federal Reserve Bank of Philadelphia. "May 1, 1940," Business Review (Federal Reserve Bank of Philadelphia) (May 1, 1940). https://fraser.stlouisfed.org/title/5580/item/557139, accessed on March 28, 2024.
Federal Reserve Bank of Philadelphia. "May 1, 1940," Business Review (Federal Reserve Bank of Philadelphia) (May 1, 1940). https://fraser.stlouisfed.org/title/5580/item/557139, accessed on March 28, 2024.