Federal Reserve Bank of Philadelphia. "June 1, 1940," Business Review (Federal Reserve Bank of Philadelphia) (June 1, 1940). https://fraser.stlouisfed.org/title/5580/item/557140, accessed on April 18, 2024.
Federal Reserve Bank of Philadelphia. "June 1, 1940," Business Review (Federal Reserve Bank of Philadelphia) (June 1, 1940). https://fraser.stlouisfed.org/title/5580/item/557140, accessed on April 18, 2024.