Federal Reserve Bank of Philadelphia. "July 1966," Business Review (Federal Reserve Bank of Philadelphia) (July 1966). https://fraser.stlouisfed.org/title/5580/item/557453, accessed on April 18, 2024.
Federal Reserve Bank of Philadelphia. "July 1966," Business Review (Federal Reserve Bank of Philadelphia) (July 1966). https://fraser.stlouisfed.org/title/5580/item/557453, accessed on April 18, 2024.