Federal Reserve Bank of Philadelphia. "July 1960," Business Review (Federal Reserve Bank of Philadelphia) (July 1960). https://fraser.stlouisfed.org/title/5580/item/557381, accessed on April 24, 2024.
Federal Reserve Bank of Philadelphia. "July 1960," Business Review (Federal Reserve Bank of Philadelphia) (July 1960). https://fraser.stlouisfed.org/title/5580/item/557381, accessed on April 24, 2024.