Federal Reserve Bank of Philadelphia. "September 1956," Business Review (Federal Reserve Bank of Philadelphia) (September 1956). https://fraser.stlouisfed.org/title/5580/item/557335, accessed on April 18, 2024.
Federal Reserve Bank of Philadelphia. "September 1956," Business Review (Federal Reserve Bank of Philadelphia) (September 1956). https://fraser.stlouisfed.org/title/5580/item/557335, accessed on April 18, 2024.