Federal Reserve Bank of Philadelphia. "April 1969," Business Review (Federal Reserve Bank of Philadelphia) (April 1969). https://fraser.stlouisfed.org/title/5580/item/557487, accessed on May 3, 2024.
Federal Reserve Bank of Philadelphia. "April 1969," Business Review (Federal Reserve Bank of Philadelphia) (April 1969). https://fraser.stlouisfed.org/title/5580/item/557487, accessed on May 3, 2024.